Ralph Backé found mathigon--textbook-of-the-future:

• Slightly builds student knowledge“Haven't yet used it with students.”
• Slightly improves teaching efficiency and productivity“Still getting to know program”
• Slightly saves school money“Have not used Mathigon at school yet.”
• Slightly provides school data“See last”
• Slightly teach-problem-solvings
• Slightly improves creativity and critical thinking“See last”
• Slightly improves creativity and critical thinking“See last”
• Slightly improves parent engagement“See last”