Investigating Multimedia Case Studies as a Tool for Pre-Service Teacher Development

9725512 Doerr呼吁数学教学改革建议教师应该反思自己的实践，通过创造课程序列来指导学生的数学发展，支持学生努力随着时间的推移建立越来越复杂的理解。然而，方法课程的职前教师没有可以反思的实践，也几乎没有观察到学生随着时间的推移发展数学概念的过程的第一手经验。因此，编写这项建议是为了填补这一空白，方法是创建、实施和研究三个以光盘为基础的案例研究，重点是在以改革为基础的中学和中学课堂上教授的实际课程序列。这个拟议项目的两个目标是(1)更好地了解如何利用多媒体案例研究来支持职前数学教师有效实践的发展；(2)完善我们的设计理论，阐述使案例更有效地促进这种反思的具体方面。***

9725512 Doerr Calls for reform in mathematics teaching suggest that teacher should reflect on their own practice and guide their students' mathematical development by creating lessons sequences that support students' efforts to construct increasingly sophisticated understandings over time. However, pre-service teachers in methods courses do not have a practice on which to reflect, and have little, if any, first-hand experience observing the processes by which students develop mathematical conceptions over time. As a result, this proposal has been written to fill this void by creating, implementing, and researching three CD-ROM based case studies centered on actual lessons sequences taught in reform-based classrooms at the middle and secondary level. The two goals of this proposed project are (1) to better understand how multimedia case studies can be used to support the development of effective practice among pre-service mathematics teachers, and (2) to refine our design theory to elaborate specific aspects that make cases more effective in promoting such reflection. ***