It has some great resources, I actually found it a while ago when working on my masters degree and needing help with a lesson plan. It's free to sign up and there are a ton of free resources, plus some cheap ones too. And you know if you are paying for something you are helping a teacher out-they don't make much and we all know their job is not easy.
I just downloaded a bunch of free things to use for homeschooling my kids this coming year, I am so excited! I also noticed that "homeschooler" is actually a category you can search for, but I just search by grade level or subject depending on what I'm looking for.
I love Teachers Pay Teachers! I actually have a store there and sell some things. I also like Teacher's Notebook (actually prefer that one). I get regular e-mails with Teachers Notebook that will list freebies of the day. I've downloaded a lt of great stuff, most of it free!