In the early spring, I found Pinterest, which has easily come to be one of my biggest obsessions. I've been pinning like a madwoman. Now that I have been offered and accepted a position in a new district, I feel like a whole new teacher. Of course, in the past seven years I have spent lots of money on this and that's that just had to be a part of my classroom. This time, though, I am trying to be a bit more savvy. So when I saw an idea for rehabbing my mailboxes, I couldn't wait to get a…