I think some kinds of extracurricular activities are good, but it's depends on which level you are in.
    First of all, when students are in primary school, they don't have to be tutoring in after-school, they need to relax in after-school. At that time, the most important thing for them is to have fun with their friends, to have a great childhood. It is good for developing their imagination. Secondly, when students are in high educational levels, they need to get the extra help from the tutors. They have to get some stress from study.