This is a great, simple fact sheet that lays out the origins and history of CCSS. And it’s a pdf– so if you want to print it out and hand it around, you’re all set.
I’m going to start out with one of my own posts. This is my attempt to explain as simply as I can how we all ended up living with the Common Core State Standards peeking over our collective shoulders. If you aren’t clear on how we ended up with these, this is as good a place to start as any.