I was doing some research on differentiated instruction and algebra.
I found this site describing the use of graphic organizers in math class to help students organize and make sense of the information. I find that I use many, many of these in my lessons, not to mention manipulatives such as algebra tiles to help make a little more concrete the algebra learning happening in class.
Then I saw this diagram (graphic organizer) of how to solve a math problem. My whole approach to Problems of the Week is based on George Polya's work.