This chapter examines the teaching of geometry, statistics and probability, and discrete mathematics. The study of geometry is a primary emphasis in both the secondary and middle school curricula. The chapter deals with a brief discussion of the role of pre-calculus and calculus courses in high school. Regardless of the specific grade levels at which various topics are studied, the mathematics curriculum at the secondary and middle school levels continues to feature the study of number, algebra, geometry, measurement, statistics, and probability. One way to approach the teaching of geometry through a contemporary lens is through the exploration of fractal images. Students’ exposure to geometry should also be rich and developmentally appropriate according to the levels of thinking outlined by the van Hieles. The difference between collaborating and cheating is one of the many life skills that students can be taught in the context of a mathematics class.