There may be other apps more appealing to teens. However, whether they are filling out a university application form or applying for their first "real" job, applicants will inevitably be asked to evidence skills and achievements. Linkedin can be a great place for teens to keep track of all the things they will want to include in an application for college or work. An added benefit is that it's a place to go ahead and connect with colleges they are interested in. 

• Creating a profile 101, even without a job title 
• How to use LinkedIn as a teen
• Explainer video to get them started