Do as many problems as you need to, at whatever pace you wish to go. The problems are generated at random. They're different every time. Every time you get to see the answer, and how to do the problem!
This is a collection of interactive lessons from a Grade 4 Math course developed by Winpossible - the course uses an innovative instruction format by combining an engaging animated character's visual and voice with Winpossible's unique ChalkTalk™ technology (patent pending) in order to replicate the "classroom experience" for students. The course matches with the Grade 4 correlations of most states in the US.