This five-book series teaches junior and senior high school students words derived from the most important Greek and Latin roots. Every lesson introduces up to fifteen words derived from two or more classical roots. A dictionary-like format provides all the necessary information, including related forms of the word and sentences illustrating each word's correct usage. Special sections called "Nota Bene" provide information about etymologies and words that might be confused. Drawings, illustrative sentences, and challenging exercises help students master the vocabulary they need to read works of literature and prepare for SAT's. Exercises based on synonyms, antonyms, analogies, vocabulary in context, and sentence completions not only test students' mastery of definitions but also develop their familiarity with the format of comparable items on standardized tests. Other exercises offer practice in recognizing correct usage. Books D and E also contain an exercise that tests vocabulary in context for each lesson.