First, the voice acting and characters are awful. They are just kind of low budget and lazy. Second of all, the lessons take WAY too long. A lesson takes at least a half hour or more... That's more than the time i can complete a lesson on a regular math book. When you fail, you have to start the whole long lesson again and you learn nothing. Also, the difficulty curve is awful. First, there is simple stuff like things for first grade. Then, oh boy it just gets A LOT harder. Overall, there are way better education websites you can use. User's recommendation: Do not use.