Math Open Reference

http://mathopenref.com/

http://www.upworthy.com/a-man-explains-why-he-treated-a-knife-wielding-mugger-with-kindness-and-respect

http://ell.stanford.edu/
Great for understanding academic language for teachers.

A World without Teachers (Video)

How Youth Learn

Celebrating PI Day by Exploratorium

http://www.exploratorium.edu/pi/

OPEN EBOOKS

http://www.openebooks.net/about.html?utm_content=&utm_medium=email&utm_name=&utm_source=govdelivery&utm_term=