This crossword package definitely will be a great toy to learn the most important GRE words with fun. There are 500 GRE words in the set, and are evenly organized to 50 unique cards, so each card has 10 GRE words. FIrst page of every card is for playing. The second page shows the clues of the words. The third page is for checking (color in green represents a correct answer and color in red represents an incorrect answer) or you can display the correct answer. The last page is the flashcard session. There are 10 flashcards in this page in which contain exact 10 words of the card. The flashcards are used to review/learn the words.