Use Game Center to track your child's performance in math with these quick quizzes.nImprove math skill with the builtin lessons on arithmetic, percentage, and letter grades.nnFeatures:n Game Center Achievements Just like a report card.n Add, Subtract, Multiply, and Divide Cardsn PerCard Gradesn Gradeasyougon 25 Problems per Cardn Quicktouch responsen Touchandhold for additional feedbacknnGreat for learning at all ages