When practicing the different number forms, why not turn it into a game with your students! Practice standard form, word form, and expanded form with these puzzles. Simply copy onto card stock, laminate, cut out,and place all pieces of the 7 puzzles into a gallon size baggie. Use as a Guided Math station or Math Center & let the learning/reviewing begin. When my students have finished, I give them a piece of construction paper and have them create more puzzles for the class to complete.