This site is amazing. It is FREE and you can download leveled nonfiction Text passages and questions. Lessons can also be filtered to CCSS. MUST check out, but you will have to create an account to use the site, but it is FREE!
A common scale for matching reader ability and text difficulty: www.lexile.com
The BEST site for writing-Writing workshop, mentor texts, journals, RAFTS, and more! Writing Fix
If you don't know about Teacher's Pay Teacher's you MUST click here! It is a website where teacher's sell or give away all their worksheet and unit creations. You download and print.
Teacher's Notebook is similar to TpT above. Another great spot, inexpensive and targeted to exactly what you teach.
Pinterest is a Pinboard site that has enormous potential for teachers. It is all visual and you can pin ideas, pictures of classrooms, unit ideas, etc. Or use it to search. You do have to create an account but it is FREE!
Read, Write, Think is a site that offers not only teacher resources, but also student interactives which allow your students to create poems, letters, diagrams, online.