Sites that I can't do without as a math teacher (and what's so special about each one!) Links to virtual manipulatives, discovery-based lessons, free graphing software, question prompts, eBooks, and more.... Tons of resources for math teachers
13 Pythagorean Theorem Activities for Your Classroom
A ton of ideas and resources for teaching a practicing Pythagorean Theorem.
Quadratic Function Review by NIA's Secondary Math Market | Teachers Pay Teachers