The best periodic table reference online, hands down.
Teens should think twice before posting an online resume.
Brief video lessons from pro teachers give teens a boost.
Chat, listen, and learn on Google's communication platform.
Social site is wide open for cyberbullying.
PBS site gives kids reasons to care about the news.
Fresh voices tackle big questions with kid-created radio.
Real-world treasure hunts are best for teens or as a family.
Cloud-based video-creation site makes collaborating easy.
Unique tool lets kids organize ideas in a nonlinear way.
Clever study materials for teens merge humor and learning.
Nonprofit site that empowers Millennials to get involved.
Teens share detailed stories of addiction and recovery.
DIY site encourages kids to tinker, create, invent, think.
Share thoughts with a select few -- or the entire world.
News site with good intentions but some iffy content.
Create a dancing elf version of yourself.
TV show site unites fans and stokes audience participation.
This site lets amateurs write and share their own takes on the popular vampire stories.
MySpace-like site lets you create your own social network.