Kids' Health: Checkout this site for lots of information on most any topic you can think of. Find great info, games, and quizzes to learn more about yourself and what's happening in your life.
For Kids: https://kidshealth.org/en/kids
For Teens: https://kidshealth.org/en/teens/?WT.ac=k2t_tab
Netsmartz: Learn about staying safe online and in the tech world through fun games, videos,e-books, and comics.
For Kids: http://www.netsmartzkids.org
For Tweens: http://www.nsteens.org
For Teens: http://www.netsmartz.org/Teens