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Heads of secondary school mathematics department were surveyed to assess their perceptions of how they influence and impact students' performance in mathematics. Survey results showed both agreement and discrepancy between what department heads perceived as actual and optimal activities to enhance instructional improvement, influence student achievement, and implement initiatives for change. The report concludes with a description of the pre-service and in-service programs.

Modeling is a flexible, powerful, and engaging tool for middle school students to use to enhance their problem-solving skills. In this article, we describe one teacher's first efforts to develop her students' modeling expertise in a variety of arithmetic word problems. This modeling approach emanates, in part, from our observations of Singapore schools and curricula during the year 2001. We initially describe some of the basis for modeling that is grounded in current research and standards documents.

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