Word Source: The Smarter Way to Learn Vocabulary by Randy Howe
A nice touch in this textbook is the cheat sheet for common formulas.
Word Source : The Smarter Way to Learn Vocabulary Paperback Randy
A nice touch in this textbook is the appendix with useful formulas and tables.
Math Source The Smarter Way to Learn Math Kaplan Math Source 2nd EDITION
A nice touch in this textbook is the checklist of learning outcomes at the start.