Includes 30 Boom Cards for students to practice addition and subtraction symbols. Students must determine which symbol is needed to make the number sentence correct. Great way to add rigor! Please Note: When you download this product, you will receive a PDF file with a link to the BOOM cards.Boom cards are self correcting, engaging, fun and interactive, paperless, easy to prep, can be accessed on a tablet or interactive whiteboard, can be accessed by website or an app! Includes:*PDF Link to Down