School asks kids in year 1 to practice their maths on the Numbots app regularly, DS likes it, it's just that in order to progress a level you have to complete the sums at a quick enough speed. He knows the answers, he just isn't fast enough so he's stuck repeating the same thing constantly (we are seperately investigating possible issues with him having a slow processing speed). Could anyone recommend an app he could practice on instead that I can suggest to his teacher we could use as an alternative at home (very happy to pay for it). Thanks very much