TeachersFirst.com

TeachersFirst is an online resource that provides teachers with lesson plans, learning activities, web reviews and much more. You can sort through their collection of resources by different classifications including subject & grade. They are currently offering a full service membership for free to the first 100 teachers that sign-up. They also have a regular free membership that provides access to a limited range of their resources, which is available regardless of how many people sign-up.