Kids Know it is a great resource for teachers and students. It is packed with lots of information about math, science, history, and other subjects. There is also tons of educational games and songs. This interactive learning site will make any kid want to learn. 

Online Calendar for teachers. Can be edited by instructor and accessed by parents and students.

GOOGLE RULZ! This site is packed with tons of resources for teachers. Teachers can access activities, search professional resources, or use such tools as Google Earth. 

This website is a good resource for special education teachers. It has information on different disabilities and resources for teaching. 

Teacher Vision is a great website for all teachers. Here you can find lesson plans for all grades and subjects. This website has information on the latest news in teaching and has tons of resources for teachers.