Used extensively in Montessori classrooms, 3-part cards are a great way to practice sorting, word/picture matching, and introduce new vocabulary. To extend the use of these cards, it is best to print on card stock and laminate. Cut the cards on the lines. You will notice that on one set of cards the words separate from the picture and on the other the words and picture remain together. The set that remains together is your "control" set. Message me if you have any questions!