They want more responsibility and independence.
In third grade, kids begin to realize they don’t need their parents for every simple task. Add this to new intellectual skills, and suddenly they want to do it all.
What you should do: Give your child plenty of chances to show how responsible and independent he can be. Ask him to make his own bed, clean his own room or do his own laundry. Assign household chores like doing dishes, taking out the trash and mopping the floor, and compliment your child on jobs well done.