Classrooms come alive with student discussions, literacy writing, and active questioning as students classify and compare the 64 triangle cards to learn about side and angle relationships. Students start making relational decisions about triangles with minutes! Teachers can use the Solving with Pythagoras deck of cards along with the classroom ready cooperative group activities in the 62 page teacher manual. Students discuss, compare, justify thinking, and record solutions using the discussion questions that follow every cooperative learning activity. A Conjecture Sheet, record sheets for keeping calculations, plus several Decision Mats encourage math literacy with topics including similarity, Pythagorean Theorem, trig ratios that compare triangle sides, regular polygons, plus area and perimeter. 64 cards.