Sophia found mathigon--textbook-of-the-future:

• Significantly builds student knowledge“The interactivity really brings context to the math, which for my brother, is the difference between understanding and confusion.”
• Slightly improves teaching efficiency and productivity
• Slightly saves school money
• Slightly provides school data
• Significantly teach-problem-solvings
• Significantly improves creativity and critical thinking“Very much like the above. The problems that are posed on Mathigon are well-thought-out and apply math properly in the real world.”
• Significantly improves creativity and critical thinking“Very much like the above. The problems that are posed on Mathigon are well-thought-out and apply math properly in the real world.”
• Slightly improves parent engagement