Wanted to share this link which gives you the code to add a Common Core Widget to your website:
http://www.masteryconnect.com/learn-more/core-app.html Directions for how to add it are on this page as well. Note you can direct the app to start at at certain grade level.
This will create a small tab on the side of your website that puts the Common Core at your fingertips. These work great on SchoolCenter. Thanks to Polenta for finding this and sharing!