There are many sites out there that are so beneficial to teachers. Many are filled with lesson plan ideas and links for students to use for educational games, etc. Some of my favorites are:
http://www.mpsomaha.org/reagan/
This is our own school's website which links me to all of our district sites and tools. It also has many websites for the students to use to study and practice what they're learning in school.
http://edhelper.com/
I became a member this year to this website. It has a ton of lesson plan ideas, workbooks, printouts, etc. to use. I have found so many useful tools on this site.
http://pics4learning.com/
This website is full of images that students can use that are safe. Many apply to educational material.
Pawnee City Technology
14 years ago