Hi My son skipped 3rd grade finished 4th grade and is now in 5th grade. However he is doing 6th grade math. He is finding it a bit challenging. But better than getting bored in 5th. I am hoping he will get the hang of it soon. I asked his teacher she said he is doing really well, gets the concept and is quite confident. So I would say speak to the teacher to make sure your kid is not overwhelmed.