It was hard for him to get back in the routine of school, and his grades suffered. There aren't many jobs in our area.
Teenagers are happiest when they're kept busy.
Your son needs to know that his time in front of the TV will be severely limited this summer. Even if he can't find a paying job, there are lots of things he can do. Perhaps he can find a volunteer position with a local organization. If he'd like to earn money, perhaps he can start his own small business. He can run errands for busy families or for senior citizens who have trouble getting around.