This is a free online textbook designed for the Advanced Algebra instructor. According to the author, he "developed a set of in-class assignments, homework and lesson plans, that work for me and for other people who have tried them. The complete set comprises three separate books that work together:
•The Homework and Activities Book contains in-class and homework assignments that are given to the students day-by-day.” http://www.merlot.org/merlot/viewMaterial.htm?id=434004
“•The Concepts Book provides conceptual explanations, and is intended as a reference or review guide for students; it is not used when teaching the class.” http://www.merlot.org/merlot/viewMaterial.htm?id=434001
•The Teacher's Guide provides detailed lesson plans; it is your guide to how the author “envisioned these materials being used when I created them (and how I use them myself) http://www.merlot.org/merlot/viewMaterial.htm?id=434006 Instructors should note that this book probably contains more information than you will be able to cover in a single school year.”