From manipulatives to group investigations (math “labs”), Rachel and Susan have used a variety of methods to reach students. Over the past 20 years, instructional methods have continued to become more student-centered. Rachel and Susan have been willing to experiment with new methods, adopting approaches that improve student learning and retention of skills. They have been advocates of sound pedagogy, discouraging colleagues from resorting to jingles, songs, and meaningless acronyms. They encourage students to take risks and ask questions.