I approach any math textbook published after 1970 with great caution. Today a colleague dropped a copy of Dolciani's Pre-Alegbra (1970 ed.) in my campus mailbox, and I just got an e-mail that her Modern Algebra: Structure and Method, Book I (1962 ed.) is waiting for me when I get back to campus on Monday. I love that the mathematicians I work with like to give presents to English profs. like myself who appreciate a good math textbook.