Middle

In this article, we present an analytical approach for documenting the identities for teaching that mathematics teachers negotiate as they participate in two or more communities that define high-quality teaching differently. Drawing on data from the first two years of a collaboration with a group of middle-school mathematics teachers, we focus on a critical initial condition for teachers to improve their practice—determining that the effort required is worthwhile.

Shared in three sessions (Gaming Arcade, Interactive Visualizations-Simulations-and Games, and Friday morning poster session), this poster addresses the gaps identified in the Math Snacks project, and the approach to designing the games and animations that are the "Snacks". 

In this paper we focus on what happens when a task is first introduced to students as a crucial phase of instruction. We report on an empirical study of 132 middle grades mathematics teachers' instruction—in particular, the nature of the ways in which they introduced tasks, and the relationship between how they introduced tasks and the nature of students' opportunities to learn mathematics in the concluding whole class discussion.