Daniel Aguirre found mathigon--textbook-of-the-future:

• Significantly builds student knowledge“It helps me to review certain topics in more depth but with the simplicity of the way Mathigon teaches these materials.”
• Moderately improves teaching efficiency and productivity“Working through the proposed activities is very efficient because Mathigon is interactive an quite dynamic in the way it presents them.”
• Slightly saves school money“It probably saves more time than money, because I still have to buy textbooks.”
• Slightly provides school data
• Moderately teach-problem-solvings
• Moderately improves creativity and critical thinking“The activities/problems often requires you to think outside the box.”
• Significantly improves creativity and critical thinking“The activities/problems often requires you to think outside the box.”
• Significantly improves parent engagement“The activities/problems are not boring at all. The examples given when teaching any topic are interesting and sometimes even exciting.”