If parents are free, they should help guide them. It shouldn't be difficult for primary school students. Don't scold him, hit him, which will only make him afraid of studying and make his grades worse. Don't always talk about his grades when he fails the exam. Don't be too nervous in the family atmosphere, children are also very sensitive. It is not recommended to go to cram school at such a young age. Primary school grades mainly depend on attitude. If you have a correct attitude, your grades will go up, and you don't have to sit at your desk all day. I hope it helps you. Family atmosphere is very important. It is not good to be too strict or too loose. I hope your son's grades will get better.