Very well done, reveals much Gym fabric to 8th grade from (to equations!). Since the fundamental concepts of mathematics are covered. If the only way I know app that covers motivating that in such a form. But is not purely self-runner, you have to help a little motivating. Or additionally use to practice on paper, then a media mix is possible, facilitating that learning per se. In addition, as a further supplement would then "Sofa Tutor" to mention a Youtube-like medium. "Sofa Tutor" is suitable for math and other school-training (there only as a web service, useful rather only with SizeM screen, is a monthly subscription / year subscription). The game "King of mathematics" is very well placed in the composite image and program format: Amongst other things: It is next to accuracy and speed in Points, full points there only if you are fast, leading to repetition (= learning effect rises!) Motivated. You can see the learning areas at points collect themselves choose. It is documented, what you have done, It rises only with practice and diligence on the social status, everyone wants to be king surely. (...) And also that all around is fitted simply and clearly, even more users there are next to each other possible.
Here savvy math teachers were there, with fun at reacting. Good Thing!
