When you said share, I thought you meant free. What currency is the pricing? I've never seen that symbol before. It looks like "ki" in Japanese (き).

Also, why do two people in your team not mention their full names? I always get bothered when people selling products aren't fully transparent.

Finally, does the math problems have audio? Some of my learners aren't yet able to read well in English and prefer audio playback options. That's one of the big problem with Time4Learning's math platform.