ocr: Database of more than 3,500 detailed math problems sorted into 4 levels and 250 topics, forming a carefully designed structure of learning In addition, more than 2 million mental arithmetic questions build and reinforce number skills All questions prepared by math teachers in consultation with curriculum experts in the United States and the UK 7,000 on-screen clues and answers explain -1 in detail - the math principles behind each question Intelligent software tracks each player's progress through the topics and tailors the pace to the individual - Content is customized by parents and teachers ...
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