Comparison is a powerful and important way that we learn. To support teachers in the use of comparison in their instruction, the authors developed an instructional routine called compare and discuss multiple strategies (CDMS). Similar to other instructional routines, CDMS is a structured, specific, repeatable minilesson that teachers can use to enable all students to engage in mathematics learning. CDMS is designed to allow teachers to organize aspects of their instruction around (1) comparison of multiple strategies and (2) participation in mathematical discussion.