With this terrific selection of problems, you can cover a lot of the concepts typically presented in sixth grade or use it as a supplement! Kids love to pull out a stiff card from the deck and solve the problem on it. Moving the card to the back of the deck is a tangible sign of progress. They’ll be eager to try the next one! The cards are expensive, but worth the price. I have friends who won’t part with them even though their kids have outgrown them.