This book allows students a place to organize their vocabulary words, definitions, and examples. Each topic is clearly laid out and each lesson is labeled with the vocabulary words.
I copy this on colored paper at the beginning of the year. The students keep this in their Math folder all year long. They are assigned words to do in class, for homework, etc. I even allow my students to work ahead as long as their classwork is complete. I especially love the area for examples/hints!