Student learning of mathematics, and attitudes toward mathematics, can be improved through the use of Comparison and Discussion. The focus of this workshop is on the use of the compare and discuss multiple strategies instructional routine (Rittle-Johnson & Star, 2007, 2009; Rittle-Johnson, Star, & Durkin, 2009, 2012; Star & Rittle-Johnson, 2009). The research underpinning this workshop is situated within upper primary and high school mathematics classrooms to support algebra learning. In this workshop we will work through different materials for supporting comparison, and tools to allow teachers to facilitate comparison in their own classrooms.