The centerpiece of these materials is a set of narrative cases of mathematics lessons from urban middle school classrooms that grew out of the NSF-funded COMET Project. The three volumes are:

• Improving Instruction in Rational Numbers and Proportionality: Using Cases to Transform Mathematics Teaching and Learning (Volume 1)
• Improving Instruction in Algebra: Using Cases to Transform Mathematics Teaching and Learning (Volume 3)
• Improving Instruction in Geometry and Measurement: Using Cases to Transform Mathematics Teaching and Learning (Volume 3)

The cases in this collection provide an opportunity for participants to wrestle with issues of practice that arise when teachers use cognitively challenging tasks in classrooms. The materials provide guides to the leader about facilitating analysis and discussion of the cases and designing follow-up activities that help teachers connect case experiences to their own practice.

Authors: Margaret Schwan Smith, Edward A. Silver, and Mary Kay Stein.