Poolesville High School (in Poolesville, MD) has been converted largely into a magnet school serving upper Montgomery County. Many of the students there are remarkably advanced in their academic studies and experience. In particular, a substantial number of them have completed a serious calculus course in their junior year -- and in some instances, in their sophomore year. Poolesville offers two post-calculus courses to these students: Linear Algebra and Multivariable Calculus. However, the third leg of the usual sophomore triad -- Ordinary Differential Equations -- was not on the menu. During the adacdemic year 2012-2013, I filled that gap. I taught a select group of students basically the content of the sophomore ODE course that is offerred at the University of Maryland. For more details on this course, you may consult the course web page. During the academic year 2013-2014, I taught a second group of interested students a course in Number Theory. I basically taught them the content of the UMD course, Introduction to Number Theory, MATH 406. The web page for that effort may be found here. During the academic year 2014-2015, I am conducting a bi-weekly seminar for selected Poolesville Math teachers. The seminar content is introductory topology.