FEATURES 
Squares on a Checkerboard Steven M. Schulman What is a worthwhile mathematical task? How is a task different from a lesson or an assignment? An experienced teacher and math educator shares his point of view. Includes "Reflect and Discuss". 
Preparing Teacher Leaders Mathew D. Felton and Melissa Page Findings from an extensive fouryear program with a single cohort of elementary and early middle school mathematics instructors highlight several important themes that can inform other efforts in developing teacher leaders. 
Becoming a Leader: Finding My Voice Tabetha R. Finchum Dissatisfied with the outcomes of teacherdirected mathematics pedagogy, this fourthgrade teacher learns of—and begins to implement—studentcentered, problemsolving mathematics in her classroom. 
Warning Signs! Victoria R. Jacobs, Heather A. Martin, Rebecca C. Ambrose, and Randolph A. Philipp Avoid three common instructional moves that are generally followed by taking over children’s thinking. 
A practice scenario

Variations in BothAddendsUnknown Problems FREE PREVIEW! Zachary M. Champagne, Robert Schoen, and Claire M. Riddell Early elementary school students are expected to solve twelve distinct types of word problems. A math researcher and two teachers pose a structure for thinking about one problem type that has not been studied as closely as the other eleven. 