Math Education of Elementary Teachers: A Challenging Issue.

Anoop Kalsi

University of Maryland

As Piaget stated, "Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves." (Papert, 2001, p. 2) And customarily, we teach math too quickly to our students in the United States of America. Following Piaget’s work, there has been a general awakening to the fact that children are active builders of knowledge and not empty vessels to be filled with facts. However, there remain to be introduced major changes in our classrooms that would break the tradition of introducing essentials and grant the students time and encouragement to master mathematical ideas. We need to realize as educators that practicing the art of making theories may be more valuable for children than achieving “meteorological orthodoxy” (p.2) On the same note, we also need to realize that materializing this vision calls for better prepared and more flexible math teachers. This paper is an attempt to analyze the various issues encircling the elementary teaching of mathematics. The NCTM and Achieve standards along with CBMS recommendations are used as a lens to verify where to begin reforming the math education and why; how well prepared are our elementary teachers to take up the challenge; and, what will it take in terms of elementary teacher preparation to bring about a long-lasting reform.

How early to introduce the reformed methods of teaching math?

To build a tall building, one requires a strong foundation; and, to get the American students at a height that the reformists hope them to achieve, students need to start constructing the foundations of understanding at the earliest. This means that we have to start at the base with elementary students and elementary teachers if we want to meet the raised expectations for middle and high school mathematics. Also, it is a fact that “Age increases at a constant rate but cognitive level …tends to follow an uneven fast, then slow, trend.” (Stokes, 1990, p. 313) Furthermore, we cannot predict the periods of cognitive growth. As such, if we don’t provide our young students with the right kind of intervention and experience in their early years, we might deprive them of some very vital cognitive growth opportunities. As Conference Board of the Mathematical Sciences (CBMS) recommendations (2001) summarize:

It is during their elementary years that young children begin to lay down those habits of reasoning upon which later achievement in mathematics will crucially depend. Thus, for example, it is unrealistic to expect students who failed to develop early an understanding of how to manipulate arithmetic expressions to later manipulate algebraic expressions with confidence. And those students who have never had experience with decomposing and recomposing shapes in their early education are unlikely to attach meaning to the succession of assertions in typical proofs in Euclidean geometry…The power to reason mathematically is a natural human capacity. Young children enter school already curious about number and size, and with ideas about how to join, remove, and split quantities. Mathematics instruction in the elementary years can---should---be designed to cultivate this curiosity. Encouraged to solve problems, children become aware of their ideas; and as they learn to analyze their own, their classmates’, and their teacher’s thinking, these ideas become more refined and many-sided. It is during these early years that young students lay down those habits of reasoning upon which later achievement in mathematics will crucially depend.

Hence, it is our duty as educators to make sure that we present young minds with every opportunity to make exciting discoveries and grow intellectually into students who have the understanding to appreciate the value of mathematics and enjoy the challenges that come with it. To make an effect, we need to introduce reforms at the beginning because anything later than the earliest might be too late.

What is expected from the elementary teachers?

Teaching elementary mathematics is extremely challenging and prospective elementary school teachers must be prepared to teach everything from counting to algebraic thinking (Franke, 2000). They must not only understand the mathematics they are to teach but also be able to engage students in that content. The subject knowledge is indispensable because only teachers who have a deep understanding of content are capable of “making connections, promoting discovery, evaluating alternative responses, and providing experiences that promote higher-level thinking skills” (Cain, 2000). On the other hand, content knowledge is not enough because we expect teachers to do more than walking their students step-by-step through an algorithm. As Franke (2000) points out:

Knowledge-in-action demands that teachers know how to use their knowledge of the content to enhance the understanding of their students. Teachers need to know what question to ask when a student tells them that 7 =3 +4 is not true. They need to know which problem to pose next and what a student could say to demonstrate understanding.

That is, we need elementary teachers to develop an attitude towards learning and teaching mathematics that will help them communicate the truth that mathematics is not “a succession of disparate facts, definitions, and computational procedures to be memorized piecemeal” (CBMS Recommendations, 2001). Rather, we need to provide elementary teachers with a program that will enable them to become teachers with “detailed knowledge of students’ thinking, a way of organizing that knowledge, and a view that this knowledge is theirs to add to, challenge, and adapt” (Franke, 2000). Let’s look more closely into the three sets of expectations as outlined by the CBMS, NCTM and Achieve (Foundations for Success).

i) CBMS recommendations

The CBMS recommendations (2001) sum up the qualifications of an elementary teacher as follows:

Teaching elementary mathematics requires both considerable mathematical knowledge and a wide range of pedagogical skills. For example, teachers must have the patience to listen for, as well as the ability to hear, the sense---the logic---in children's mathematical ideas. They need to see the topics they teach as embedded in rich networks of interrelated concepts, know where, within those networks, to situate the tasks they set their students and the ideas these tasks elicit. In preparing a lesson, they must be able to appraise and select appropriate activities, and choose representations that will bring into focus the mathematics on the agenda. Then, in the flow of the lesson, they must instantly decide which among the alternative courses of action open to them will best sustain productive discussion.

Plainly speaking, the CBMS recommends that the elementary teachers should be highly aware of the numerous connections in the mathematical ideas. They should be flexible in drawing upon their personal knowledge of the subject and help redirect students as they wander off many tangents to focus back on a productive discussion about the math involved. Therefore, the teachers should have ample patience to listen and understand the reasoning of their young scientists so that they can build on a student’s conjectures rather than giving them recipes of the right way to solve a problem. In short, the teachers should act like a catalyst in a class full of experimentation and exciting discoveries.

ii) NCTM standards

In addition, there are some expectations on behalf of the National Council of Teachers of Mathematics (NCTM). Although the document doesn’t explicitly outline the requirements for elementary teachers’ certification, it does present the following set of expectations for teachers in general and some aspirations for the elementary teachers in specific (NCTM, 2001):

In the elementary grades, convincing students that they can do mathematics and helping them enjoy it are important goals.  Elementary school students need at least an hour of mathematics instruction each day. The decisions teachers make in the classroom about how to offer all students experiences with important mathematics and how to accommodate the wide-ranging interests, talents, and experiences of students are essential to giving all students access to mathematics. Although many matters bearing on their classrooms are beyond teachers' sole control, they need to take the initiative in discussing trends and opportunities in mathematics education with administrators. Mathematics teachers can foster reinforcement of their efforts by families and other community members by maintaining dialogue aimed at the improvement of mathematics education. To do all of this well, teachers need to understand their mathematical goals and their perspectives on mathematics education and be able to articulate them in compelling ways. They should constantly evaluate curricular materials and offer suggestions to teacher-leaders and administrators, and they should find ways to be involved in choosing the instructional materials for their school or district.

That is, the NCTM guidelines encourage teachers to participate as active members of the math community outside their classrooms and lay higher standards for involvement of all teachers, including the elementary school teachers. Furthermore, it encourages elementary teachers to challenge each and every student according to his or her personal intellectual capabilities. To meet this demanding expectation, as children grow at a variety of rates in terms of cognitive development, teachers need incredibly high energy and patience levels to monitor and challenge each individual. Also, the NCTM suggests a better communication amongst the parents and teachers to create a support system for the growing minds at home as well as school. This again calls for teachers to go farther than the class work and reach the primary educators of any child, that is, his or her parents. Finally, the council stresses that teachers need to make it a priority to encourage the natural curiosity of young students and guide them to a path of discovery where they can unravel the coexisting beauty and power of mathematics at their own pace.

iii) Achieve and Foundations for Success:

Yet another set of expectations that are parallel to the NCTM standards, are laid out by the consultation draft of Achieve, Inc. titled Foundations for Success (FFS). The Foundations for Success is mainly written for the middle school curriculum but it includes a few references as to what the elementary students should be prepared for in order to successfully meet the Achieve aspirations for math in the middle school. The specific expectations that refer to elementary students and not elementary teachers per se are as follows (FFS, 2001):

Students need to enter the middle grades with confidence that mathematics is a source of useful tools for solving interesting problems. To build confidence and enthusiasm, students need strong preparation from kindergarten to grade five, including:

·        Fluency with manual computation and mental estimation;

·        Experience visualizing and drawing geometric objects;

·        Practice formulating mathematical questions from various contexts;

·        And, plenty of opportunities to explain and critique mathematical thinking and use mathematics to solve problems.

Elementary school students need to become fluent with the basic computations of arithmetic, and they also need to understand why these procedures are valid and what concepts they represent. Thorough understanding grows best from extensive hands-on experience-in measuring and counting, exploring common geometric objects and in representing data in different forms. It is not enough to focus just on computational and procedural skills because students’ ability to reason mathematically depends on a deep understanding of central mathematical concepts. In turn, procedural skills provide firm support for conceptual understanding.

The Achieve expectations are in line with the thought that elementary students need to develop a thorough mathematical understanding of the elementary concepts; however, they do not specifically dictate what the teachers need to do so that they can assist their students in reaching that understanding. Instead, they provide numerous examples and sample solutions that primarily focus on “concepts that need clarification or are difficult to teach” (FFS, 2001). The illustrative problems also attempt to clarify subtleties in terminology through specific examples.

As a whole, the expectations for elementary teachers are high and demanding. To enable and support the elementary teachers in completing the crucial task of founding the floor of mathematical understanding, every community needs to provide their elementary teachers with not only the right education and enough preparation but also with generous incentives and genuine appreciation.

Are we expecting too much? Where do we stand with the mathematical preparation of elementary teachers, and why?

In the words of Leitzel, “The mathematical preparation of elementary school teachers is perhaps the weakest link in our nation’s entire system of mathematics education.”(Hungerford, 1994, p. 15) (Leitzel, 1991). In most states, teachers in grades k-6 are not mathematics specialists. In fact, only 7 percent of elementary school teachers majored or minored in mathematics or mathematics education. Furthermore, 40 percent of the elementary school teachers report that they do not feel qualified to teach the content that they teach (Stiff, 2000). Along the same lines, in a report submitted by the Committee on the Undergraduate Program in Mathematics (CUPM) in 1963, it was found that of the colleges that reported, 55.6 percent offer no mathematics courses specifically designed for prospective elementary school teachers (Hardgrove, 1963, p. 872). The scene has not improved significantly since the 1963 report by CUPM. In 1998, National Center for Education Statistics reported that only 38 percent of public school teachers held subject-matter specific degrees, whereas 62 percent held degrees in various education-related fields (NCES, 2001).

There are multifaceted issues contributing to the above-sketched gloomy state of affairs. One simple reason is that unfortunately, neither the students (prospective elementary teachers) nor their instructors have any immediate reasons to change. Moreover, the prospective elementary teachers generally have “weak mathematical backgrounds and a high level of mathematical anxiety” as students (Hungerford, 1994, p. 15). Many a times, the elementary teachers have had a bad learning experience with mathematics and claim that they hate math, they couldn’t learn it and they can’t teach it (Cornell, 1999, p. 225). And, as a whole, the entire education system is currently playing a circular blame game. The college professors tend to blame the high school teachers and they, in turn, blame the elementary school teachers for the poor mathematical preparation of incoming students. However, elementary teachers are trained by the same college professors who complaint about the incoming students (Hungerford, 1994, p. 15). What’s more, many instructors who teach courses for elementary teachers do so unwillingly because of the unattractive structure of courses that summarize subject matter for grades k-8 in approximately six semester hours (p. 15). Furthermore, there are very few incentives for instructors to invest their time in improving teaching methods; they are much highly rewarded for a job well done at research instead. 

Another issue that cannot be ignored is the fact the instructors for whom the subject comes easily, lack respect for their math-anxious and math-avoidant students (Andrews, 2000). The college teachers often riddle their lectures with disrespectful remarks such as “It’s easy”, “Couldn’t be simpler” and so on. Also, the teachers’ assumptions of student’s knowledge can make it difficult for the teachers to recognize that “seemingly simple, self-explanatory processes may be complicated to others” (Cornell, 1999, p. 226).  And, further use of obscure vocabulary, incomplete instruction by skipping sub-steps for mathematical procedures, overemphasis on rote memory and presenting math in isolation of the real world, can lead the math-anxious students to become frustrated and give up trying altogether. Finally, it is not a surprise that “Elementary teachers who don’t know much mathematics, who have little interest in what it means to do mathematics, and who are afraid of mathematics, are not likely to engender positive attitudes toward mathematics in their students. Yet these are the kind of teachers that current system is geared to produce.” (Hungerford, 1994, p. 16)

What can be done to better prepare the in-service and pre-service elementary teachers?

Undoubtedly, there is a lot that needs to be done. However, before carrying out any suggestions, it is foremost important to note that for successful implementation of any plans, it is crucial that the people involved in elementary teachers’ preparation develop a right attitude towards their education. There is a critical need to increase the awareness and respect in the math society for the kind of educational training that the elementary teachers need. As Angela Andrews (2001) claims in her paper, it is always easier to blame the victims than to teach them; and, the majority of teacher educators are accustomed to blaming the weaker math students rather than helping them break free of the fears developed towards learning mathematics in their earlier school experiences. This negative attitude of the instructors disables them from appreciating the potential “gift of the math-anxious teachers” that are already motivated by their own struggles and want to ensure that none of their students have the same difficulties. Andrews’ remarks are supported by the CBMS recommendations as well. The CBMS (2001) recommendations state that:

Too many students preparing for elementary teaching have been less than successful mathematics students, and even those with good grades often doubt their competence. Understandably, readers of this document may feel dismay at the prospect of working with such math-anxious, if not math-phobic, undergraduates. However, those who work with them can testify that, once these prospective teachers experience their own capacities for mathematical thought, their anxiety is transformed into energy for learning. In taking responsibility for the kind of instruction for elementary teachers envisaged here, mathematicians are invited, in effect, to re-enter the world of the naďve mathematical thinker. The recognition that the "unsophisticated" questions teachers pose do raise fundamental issues should inspire instructors to find contexts in which these can be addressed fruitfully. This means, at least initially, approaching the mathematics from a concrete and experientially based, rather than an abstract/deductive, direction. Isn't this the way each of us starts our individual journey into the world of mathematics?

Evidently, it is vital for the math educators to “re-enter the world of naďve mathematical thinker” in order to prepare the teachers who will work with young minds at the beginning of their journey to construct and develop mathematical understanding. Finally, it is important to note that attitude adjustment is required on the behalf of education department as well, because effective change won’t be possible unless the education college requires its elementary majors to participate in the reformed program. Many education faculties do not value mathematics to the same degree as mathematicians and are satisfied with the present situation; therefore, in this case, it is essential for the math department to “sell” mathematics to others (Hungerford, 1994, p. 19).

Secondly, there is a need for efforts at community and state levels to develop a support system to help the in-service teachers further their education and the pre-service teachers get the right training to meet their job’s high and increasing expectations. To list a few steps needed, “district and school officials must foster working conditions that allow teachers’ knowledge to grow. Curriculum and assessment developers must create appropriate instructional materials-moreover, publishers understand that developing such material takes time and must be willing to publish them. Finally, when considering curricula, members of state and local boards must know routes to mathematical understanding, as well as the nature of this understanding, when selecting tests for students and setting criteria for teacher certification.” (Kessel & Ma, 2001) Also, we need a sufficient number of math majors to enable the departments to offer a variety of interesting courses and to obtain adequate support form the administration. Mathematics departments need to devote commensurate resources to designing and offering courses for teachers. They need to value and properly reward faculty members who are heavily involved in teacher education. Mathematics departments engaged in teacher preparation should establish a committee on teacher education that can serve as a vehicle to engage more faculty in teacher preparation (Tucker, 2000).

Additionally, we need to increase the math requirements for elementary teachers’ certification. The CBMS specifically recommends at least nine credit hours in mathematics at college level to be a part of the elementary certification. The three courses may choose to cover topics on number and operations, on geometry, and on algebra, and respectively, selecting activities related to data to support content in each of these areas. Or, some institutions may choose other themes to define their courses that may integrate content from number, algebra, geometry, and data into each of the three courses. In either case, content and methods courses should be coordinated. However, it should be realized that “simply increasing the number of required credit hours is no solution - courses that allow students to get by using the same stratagems that got them through K-12 just perpetuate the problem” (CBMS, 2001). Also, in addition to more courses from those already offered for other audiences, some new courses specifically designed for this audience might be needed. Moreover, it won’t be enough simply to design new courses or select new texts. Instructors in these courses must be encouraged to adopt teaching styles other than the passive model: “I tell you what mathematics you need” and replace it by an active one: “With my assistance, you explore, discover, or construct the mathematics you need” (Hungerford, 1994, p.18).

To repeat, the challenge is to work from what teachers do know---the mathematical ideas they hold, the skills they possess, and the contexts in which these are understood---so they can move from where they are to where they need to go. For their instructors, as we have seen, this means learning to understand how their students think. The habits of abstraction---of compression---and deductive demonstration, characteristic of the way mathematicians present their work, have little to do with the ways children build their mathematical world, experientially, modeling concepts on actions---counting out, dividing up, comparing heights or ages. ... Mathematics courses for teachers must aim, first of all, at helping them develop ways of giving meaning to the mathematical objects under study, only then moving on to higher orders of generality and rigor (CBMS Recommendations, 2001).

Furthermore, we have to recognize the limits of time and face the fact that elementary educators are generalists, not specialists. Therefore, it is more important to help them understand and teach fundamental mathematics well rather than to lament about them not understanding a lot of mathematics (Andrews, 2001). The recommendations by CBMS (2001) reconfirm that:

As content courses are designed, it should be kept in mind that teachers will not learn all the mathematics they need to know in their undergraduate studies---even if, from their instructors' perspectives, the course content has been covered. But if their undergraduate studies cultivate an interest in and capacity for mathematical activity, teachers will be prepared to continue learning in the context of their everyday practice. Furthermore, having developed in their undergraduate training a curiosity about mathematical ideas and an appreciation of mathematical pursuits, many more practicing teachers will be interested in continuing their mathematics studies---an interest these institutions should be prepared to address.

And finally, the future teachers will need to be familiar and comfortable with a variety of technological tools, including ordinary calculators, graphing calculators, and computers, as well as appropriate geometric and computational software. It will take time, effort, and money from mathematics departments to incorporate the same into mathematics courses (Hungerford, 1994, p. 18).

While the above-mentioned reforms need a plenty of time and major changes at various levels, there is a lot that individual instructors can begin to do for their students immediately and make a difference. For example, as Thomas W. Hungerford (1994) suggests in his article, the teacher educators can make their students more aware of the mathematical resources available to them, particularly journal articles at their level. Most of the students are not aware of the vast amount of mathematical literature designed for classroom teachers. If possible, the teachers can have their students attend a meeting of the state or local affiliate of the NCTM. This can be an eye-opening experience for the students as they discover how much is going on in elementary school mathematics. The teachers can also try to encourage group discussions for a part of each class to model non-traditional teaching for the future educators. And of course, the teachers can talk to their friends in various departments about some innovative ideas as to how to make the lectures interesting even for basic topics like addition algorithms (p. 19-20).

A ray of hope: some success stories with elementary teachers’ preparation.

In a project undertaken in Austin by personnel from the University of Texas, a short-term course was introduced to increase the in-service teacher’s knowledge of mathematics. The instruction was provided in both mathematical content and in method. The topics chosen for the five hour-and-a-half sessions of the course, and covered by means of closed –circuit TV, panel discussions, smaller group discussions and lectures on mathematics and methods were as follows: numbers and numerals, base and place, structure of the number system and its relation to the four fundamental operations, some laws of arithmetic and use of models in teaching mathematics. Effort was made to base the program on experiences common to all teachers, as well as to give each session, a modern flavor. The general conclusions reached as a result of the project were the following: 1) teachers recognize their need for improvement 2) teachers will grasp at an opportunity for self-improvement and 3) the level of effectiveness of the classroom can be raised by even so limited a project as this. (Osborn & DeVault, 1960, p. 914)

At the University of Maryland, every student preparing to teach at the elementary level fulfills a requirement of eight hours of mathematics. These eight hours constitute a one-year course (four hours per semester) and are taken in addition to the customarily provided methods course in arithmetic. The course was conceived, prepared and written by the staff of the University of Maryland Mathematics project with full cooperation from the College of Education and Department of Mathematics of the University, in addition to the support of the National Science Foundation. The philosophy underlying the course does not provide simply for the memorization of a large mass of material but hopes to help each student reach a level of competence such that he will be able to read with discrimination present-day texts. The goal of the Maryland course is not to develop “creative mathematicians” but to prepare “teachers who will be able to identify mathematical potential among their pupils, and will provide and atmosphere in which this potential can flourish” (Garstens, 1964, p. 548). The course is designed to make students do proofs in geometry and help them dispel the myth that axioms are accepted as “true” because they seemed to fit in with the students’ experiences in the physical world. As such, the course aims to help the elementary teachers grow as mathematical thinkers and consequently aid them in bringing up mathematically strong students.

NCTM has also taken some initiatives in the direction of improving elementary teachers’ preparedness. As a start, this fall, the council launched its Academy for Professional Development, which is offering two-day- and later will offer five day- institutes focused on helping teachers put Principles and Standards into practice (Stiff, 2001). The Achieve Foundations for Success also tries to shed light on the preparation required at the elementary level by presenting many problems and their solutions for middle school students. A close survey of the problems that bring together various parts of math like algebra and geometry reflects that the Achieve standards are understanding-driven and expect students to reach a certain level of understanding during elementary education more than expecting them to have covered a certain range of topics.  

What can we conclude?

“Though each of us once inhabited the mathematical world of the young child, that world is lost to most of us.” (CBMS, 2001) To reach a level where we can communicate with young minds that already have some essential understanding of the world around them, we need to deconstruct our own learning and recall how we had first laid the foundations of understanding. This is a challenging job and the elementary teachers are unsurprisingly bestowed with many high expectations. It is alarming how greatly the elementary teachers lack a mathematical background needed for assisting their students in developing a well-rounded appreciation for mathematics. There are many sets of suggestions as to what elementary teachers should be prepared for and how the Universities can design programs to help them do the same. However, these suggestions will take a long time and a great deal of change in the current state of affairs. However, we are not helpless as individual reformers. Each university has the capability of offering choices for the courses dedicated to teaching pedagogical skills for the elementary level. Each teacher has the potential of engaging his or her student’s intellect. Many a times, it only takes one right experience, patient attention from one math teacher to turn around the math-anxious student into a math-loving educator. We have the right vision; we know what to do and what it will take to materialize the vision. Let’s start the journey one step at a step and let it begin with us, every member of the math and education society.

 

References:

 

Andrews, A. (2000, October). Prescription for pre-service education: Stop blaming victims and teach them. National Council of Teachers of Mathematics.

 

Retrieved December 10, 2001 from the World Wide Web: http://www.nctm.org/dialogues/2000-10/prescription.htm

 

Cain, B. (2000, October). Math in the middle: Are we prepared? National Council of Teachers of Mathematics. Retrieved December 11, 2001 from the World

 

Wide Web: http://www.nctm.org/dialogues/2000-10/math.htm

 

Cornell, C. (1999). “I hate math! I couldn’t learn it, and I can’t teach it!”. Childhood Education, 75, 225-230. 

 

Franke, M. L. (2000, October).  How much can we accomplish? Elementary mathematics methods revisited. Nation Council of Teachers of Mathematics.

 

Retrieved December 10, 2001 from the World Wide Web: http://www.nctm.org/dialogues/2000-10/howmuch.htm

 

Garstens, H. L. (1964, May). Mathematics for elementary education major at the University of Maryland. American Mathematical Monthly, 71, 547-550.

 

Hardgrove, C. E. (1963, October). CUMP report on training of teachers of elementary school mathematics. American Mathematical Monthly, 70, 870-877.

 

Hungerford, T. W. (1994, January). Future elementary teachers: The neglected constituency.  American Mathematical Monthly, 101, 15-21.

 

Kessel, C., & Liping, M. (2000, October). What we think that elementary teachers need… Nation Council of Teachers of Mathematics. Retrieved

 

December 10, 2001 from the World Wide Web: http://www.nctm.org/dialogues/2000-10/whatwe.htm

 

Mathematical Association of America. (2001).  Recommendations for elementary preparation. Conference Board of the Mathematical Sciences. Retrieved

 

December 14, 2001 from the World Wide Web: http://www.maa.org/cbms/MET_Document/chapter_3.htm

 

Mathematical Association of America. (2001). The preparation of elementary teachers. Conference Board of the Mathematical Sciences. Retrieved December 14,

 

2001 from the World Wide Web: http://www.maa.org/cbms/MET_Document/chapter_7.htm

 

National Center for Education Statistics.(2001).  Retrieved December 15, 2001 from the World Wide Web: http://www.nces.ed.gov/fastfacts/display.asp?id=28

 

Osborn, R. & Devault, M. V. (1960, November). A mathematics in-service education project for elementary school teachers. American Mathematical Monthly,

 

67, 914-915.

 

Papert, S. (2001). Jean Piaget. Time. Retrieved December 10, 2001 from the World Wide Web: http://www.time.com/time/time100/scientist/profile/piaget.html

 

Stiff, L. V. (2001). Preparing to teach young children. National Council of Teachers of Mathematics. Retrieved December 10, 2001 from the World Wide Web:

 

http://www.nctm.org/news/president/2000-10president.htm

 

 

Stokes, A. (1990). Relationships among level of cognitive development, gender, chronological age, and mathematics achievement. Journal of Negro Education,

 

59, 299-314.

 

Tucker, A. (2000, October). New thinking about the mathematical education of teachers. National Council of Teachers of Mathematics. Retrieved December 10,

 

2001 from the World Wide Web: http://www.nctm.org/dialogues/2000-10/newthinking.htm