Cup Stacking STEM Challenge | Editable Task Cards | Team-Building & Math Center Activity This Cup Stacking STEM Challenge is a classroom favorite! With fun, engaging task cards, students will practice number recognition, problem-solving, fine motor skills, and teamwork, all while stacking cups into towers! These printable (and editable!) number-based stacking task cards are perfect for early finishers, math centers, STEM bins, indoor recess, or cooperative learning games. How It Works: Eac