Addition within 20 Change Unknown

by Bee Happy

Price: 300 points or $3 USD

Subjects: math

Grades: 1,2

Description: This deck of 32 Boom cards is a fun, interactive way of reinforcing the essential skill of adding within 20, using the change unknown type of equation. Students will count on by dragging gumballs in empty tens frames to make the required number. They then record the number of gumballs used by choosing the answer and clicking on their choice. This is a great way to provide essential practice. 32 cards may be too many for some students to do in one sitting. It is possible for the teacher to select the number of cards they wish their student to see at one time. Each time a student returns to the deck another random 10 or 15 (teacher's choice) cards will be seen. This means the deck can be used many times with the order of the cards changing each time. This deck can be used independently at home or in class, for centers or small group work, to provide practice or as an assessment. It can even be projected onto an interactive whiteboards for large group use.