Riddle Books

Riddle Books develops Common Core concepts and supports the Math in Focus (Modeling Based Math) curriculum.

Treefrog Treasure

Engage students with lessons for Treefrog Treasure, a platformer game that teaches whole numbers and fractions.


Visualize a limitless array of fractions in the Fractionizer. Compare, add, subtract, and multiply two fractions with vibrant animations.


Copilot is a free and innovative teacher tool that allows instructors to view real-time student gameplay data.

Creature Capture

Get lesson plans for Creature Capture, a fun and colorful fraction-based card game.


Refraction lesson plans are for teaching fractions and discovering optimal learning pathways in math education with a space theme.