REA's Interactive Flashcard books represent a novel approach which combines the merits of flash cards with the ease of using a book. One side of each page includes questions to be answered, with space for writing in one's answers — a feature not usually found on flash cards. The flip side of the same page contains the correct answers, much as flash cards do. English Vocabulary (Set #1) is fully indexed making it easy to locate topics for study. Thanks to the book form, there is no need to look for and fish out appropriate questions from a box and put them back in the proper order, and there is no need to carry around a box of 1,000 flash cards. The book is easier to take along and carry.