- Combine the merits of flashcards with the ease of using a book.- Compared to traditional boxed flashcards, REA's Interactive Flashcard books include an index, making it easier to locate what's needed.- Each book contains up to 1,000 Q's and A's. Questions appear on one side of each page. The interactive feature allows students to write in their own answers and compare them to the correct answers on the flip side of the page. Blank cards are also included, so users can create their own questions and answers.- Each Flashcard Book measures 5 1/2 x 8 1/4 (14 cm x 21 cm).