YOUR TAX-DEDUCTIBLE CONTRIBUTION PURCHASES THIS ITEM FOR OCS - THANK YOU! Perfect for independent practice, math centers, test prep and more, our ready-to-go practice cards are designed to support third grade Common Core State Standards! The cards are filled with self-checking activities that cover essential math skillsfrom fractions to geometry! Children just slide a card into the included write & wipe pocket, use a dry-erase marker to write the answers directly on the surface, then flip the card over to check their work!