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This Montessori material is used by my students when studying grammar. After receiving a lesson on comparatives and superlatives adjectives my students work their way through three sets of sorting cards. This is set one which includes ten words with -r & -st added to the adjective to create the comparatives and superlatives adjectives. There are no internal spelling changes. Print on cardstock & laminate for best results. Sticker or stamp the back, or print extra set to use as control for independent practice after lesson is given.