Finding common denominators can be a tricky, yet critical skill for students to master! Help kids master learning how to find common denominators by using this set of task cards. In each of the 32 cards, students will be asked to re-write one or both fractions so they have a common denominator. Also included is a set of notes to help you teach this critical fractions skill to your students. One page focuses on multiplying the denominators to find the common denominator. The other note-taking pag