Must have earmuffs? In Boom™ Cards Winter Add and Subtract Movable Earmuffs to 20 Grade 2, learners drag and drop movable earmuffs on a fun tens frame. ❤️ What teachers are saying!✔️ Fitting All the Pieces Together comments, "Great resource".❤️This Boom™ Cards lesson is a perfect way to enhance math skills. ✔️Why use tens frames learning in math? ❤️Tens frames offer visuals to show the values of numbers. ❤️Working with numbers in this manner helps students to develop number sense. ❤️ Do yo