ReadWriteThink

ReadWriteThink offers a wide variety of classroom and professional development resources. These include student interactives, lesson plans, printouts, mobile apps, strategy guides,etc.

http://www.readwritethink.org/

ReadWriteThink is a tool provided for teachers to go out and find tools and resources. I used it quite a bit in grad school, because I often needed to just see a type of resource in order to create it, or to get inspiration for grade levels, etc. Great for connecting and see how other teachers are approaching things.