www.onlineconversion.com
Use this tool to convert anything! Great tool for the math and science classroom. There are tools to convert angles, area, density, force, light, numbers, power, pressure, speed, velocity!
www.bibme.com or www.easybib.com
Online bibliography maker and citation guide.
www.ted.com
A great source for video clips to show your students. You can down load talks by some of the world’s greatest thinkers and doers. You can search for videos by topic or speaker.
http://nlvm.usu.edu/
National Library of Virtual Manipulatives...great for math teachers. Their manipulatives cover topics such as numbers and operations, algebra, geometry, measurement….you can search by grade level K-12.