We just love Math U See. It is appropriate for all types of learners and we've enjoyed all of the levels up through high school. Mr. Demme is very relatable for all of the children (I have four; from kindergarten to junior in high school) and there are plenty of worksheets to help them "master" the concept before moving onto the next lesson. A child can move as quickly or as slowly as they like. The teacher's manual is very helpful too, if you need to reinforce what was taught. And, of course, the answers to all lessons and tests are at the back.