I'm pretty sure I already told you already about Teaching Blog Addict, but I have explored that site some more and you HAVE to check it out. It is a daily go-to for me now. You will love it. It is a great collection of Blogs and Pins from teachers all over the world in every possible capacity. Here are some highlights:

Summer Book Studies
Freebies, Giveaways, Linky Parties 
Blog Hop
Featured Authors
Virtual Expo

TBA Fan Page Pinboard at Pinterest
Pins divided into category