CLS Online Store

Yipes! You've got 60 minutes to answer 80 questions on plants and animals, ecology, genetics, cells and molecules, and evolution. How do you psych yourself up and score your best? This friendly guide delivers just what you need — a thorough review of biology, including special sections on "M" and "E ...

Don't panic! You've got 60 minutes to answer 50 questions covering numbers, operations, algebra, functions, geometry, trigonometry, statistics, and probability. How do you conquer exam jitters and score your best? This friendly guide delivers just what you need — a thorough review of math topics cov ...

You have 60 minutes to answer (gulp) 90 questions on U.S. history, potentially covering everything from Leif Ericson to 9/11. How do you avoid a nervous breakdown and score your best? This hands-on guide delivers just what you need — a thorough review of American history, plus two complete practice ...