This text, along with all the Dolciani books by Houghton Mifflin were the corner stones of any high school math program in the 60's-70's and early 80's. This book particularly was the book that I learned pre-calculus from, and made me become a math major. The books were literate in their context, never watered down, but not so abstract that a high school student couldn't read and follow. The Teacher's Edition's were the best of any series (until Houghton Mifflin changed the format, and made them less teacher friendly). I still have 2 TE's of this book and the solutions key, and still refer to it when I need to...it beats any precalculus book out today. Once Ms. Dociani passed away, the entire Houghton Mifflin series went down the tubes, their current texts DO NOT hold muster to this old classic!!!