The only thing to mention is that it is very important eventually for kids to get their math facts down cold. It is extremely boring but there is no way around it. It will hinder them in higher level math.
With my second grader, he got the addition and subtraction math facts down mainly by flashcards and a few Kumon workbooks. We are working on multiplication facts, incredibly, since some kids in his regular second grade class are doing that.
He doesn't like it but we are chipping away at it.