My son is in third grade and learning multiplication although he has trouble with some of them, these cards make it easy for him to take anywhere and use them at any time. We use these every day for 20 minutes using the ones that he has trouble with and we make a game out of it so he has fun while learning at the same time. He really likes these and they’re made of really sturdy plastic paper texture. They’re convenient, a very good buy and the price is super good.