I use these in 5th grade. There are three levels (easy, medium, hard). They could be used in 4th grade (with your gifted/advanced learners) and in 6th grade.Of course, flash cards can be used in MANY different ways. Solo, with a partner, game-form (think the card game "War" -- which would be super fun/challenging with this set!), or countless others.⚫I love to use these as kids either enter or exit the classroom! They enjoy the challenge, they love to race their friends, and it's a nice way to g