Some of my favorites

 Link to Amy Taketomo's Resource Page  This page includes links to other problem solving resources.

 http://www.hartnell.edu/faculty/ataketomo/resources.htm

 MIT Video Lectures in Chem/Physics/Bio/etc

 MIT OpenCourseware

GreenPowerScience 

 http://www.greenpowerscience.com/

An answer to the worlds water problems 

 http://www.youtube.com/watch?v=OAH4FwdR3pQ

 Cool Videos

Gas Density (Sulfur Hexafluoride) 

http://www.youtube.com/watch?v=GutiNPwzUA8

 Guardians of the immune system

http://www.youtube.com/watch?v=I_xh-bkiv_c

Cell Division Viewed by Fluorescence 

http://www.youtube.com/watch?v=sBcbXzamai4

 http://www.youtube.com/watch?v=m73i1Zk8EA0&feature=related

 http://www.youtube.com/watch?v=IjGgt8rOg_0&feature=related