1) Presenting Students with explicit guidance in identifying similarities and differences enhances students' understanding of and ability to use knowledge.
2) Asking students to independently identify similarities and differences enhances students' understanding of an ability to use knowledge
3) Representing similarities and differences in graphic or symbolic form enhances students' understanding of and ability to use knowledge.
4) Identification of similarities and differences can be accomplished in a variety of ways. The identification of similarities and differences is a highly robust activity. there are 4 different forms that research has indicated.
Taken From: Classroom Instruction that Works Research Based Strategies For Increasing Student Achievement by Marzano, Pickering, Pollock