I came across a fantastic online resource today that I want to share with everyone:
This is the home page for the Center for Algebraic Thinking. This innovative Center includes an online encyclopedia of algebraic thinking, a catalog of formative assessment items, a database of technological tools, iPad apps, and modules to incorporate in your algebra units. Everything is linked to the Common Core State Standards. Check it out! I guarantee it will become one of your go-to resources.
The Center is being developed by a consortium of four public and private universities: Willamette University, Pacific University, George Fox University, and Western Oregon University collaborating in a $750,000 grant from the US Dept. of Education. Also participating are Portland State University, Lewis & Clark College, and University of Northern Colorado.