Due to the very good rating of my Vorrezensenten, I bought this educational software and was initially also very impressed: The software is divided into three skill areas and can be operated very easily. Graphically it is limited to the essentials. Then I started, they try even intensely and am almost desperate! It happened to me three times that my right solution has evaluated false (in time and money for tasks). A recalculation with the calculator showed clearly: my solution is correct, the learning software is mistaken! I think that should not happen at a learning software for kids! Otherwise, the software is designed very nice and animated children to learn math. However, they should teach them the right results surely!