text: Joining extracurricular activities will improve and/or teach students social skills. Like when they first get on the team or get into the club, with other students they will most likely don't know. You have to have build teamwork but before that you need to get to know the people on your team by introducing yourself. There's always going to be a group of people that already know each other so, they will have to speak up. Not only would it build their social skills but it will expand their friend group.