There's still nothing as reliable as the web when it comes to classroom tech. Given all the sites out there, there's also nothing as overwhelming. And when you add in the fact that it's tough to find great content for older students, sometimes high school students don't get as much exposure to tech. We're here to help with this hand-picked list of the best of the best web-based tools for high school students. It features tools tuned to the sensibilities of older students, and the picks span all subject areas, including quite a few that cross disciplines. We've also made sure to curate useful and flexible tools that can be used all year long.