After I learned how to build websites in late middle school, I thought the place to channel my energies and get some real-world experience would be to create a community website for what was going on at my school.
So, for 3 years in high school, I actively built and maintained this website. It had everything that a pre-social-network community website had, but with an odd bend to help students succeed at their studies. Chatter about ongoings at school, pictures from events, banks of test prep materials, highlights from sports, calendars, guest interviews, and more.