Check out Socratic, a free app devoted to help students learn through Questions and Answers and videos.
Socratic
CrashCourse
This channel offers free, high-quality educational videos used by teachers and learners of all kinds.
iDigBio
This site makes data and images of millions of biological specimens available on the web.
Untamed Science
A site dedicated to making inspirational videos, and content for the sciences.
Body Maps
A easy to use, interactive visual search tool that allows users to explore the human body in 3-D.
Singularity Hub – The Latest In Science
Cool Site - Singularity Hub - Fresh information about the daily advances in the sciences. A dream come true for science geeks.
Carnegie Institution For Science
Let yourself geek out over the articles, news, and videos at the Carnegie Science Institution! Get the latest in fields like plant plant biology, developmental biology, Earth and planetary sciences, astronomy, and global ecology.
Citizen Science Center
You can do science too with Citizen's Science Center, a place devoted to bringing you to projects where you can do real, meaningful science no matter what your skill level.