TeachUp: Facilitating Early-Stage Teachers to Learn Instructional Strategies from Classroom Videos with Reflective Support
Recorded videos of offline open classes provide good examples for early-stage teachers to learn instructional strategies, e.g., how to organize cooperative learning. However, learning by watching these videos is challenging, as these strategies are implicitly performed, and it lacks in-situ reflective support. In this paper, via a formative study (N=9), we design TeachUp to support the learning of instructional strategies from classroom teaching videos. TeachUp adopts an LLM-powered pipeline to detect nine instructional strategies in videos (precision = 63.4%), provides reflective questions and hints while watching, and generates customized practices with reflective feedback. A within-subjects study (N=16) shows that compared to a traditional video-playing and self-practicing baseline, early-stage teachers with TeachUp are more engaged in learning and perform better in applying learned strategies to new tasks. Interviews with four in-service teachers further generalize our findings and TeachUp's use cases. We discuss practical implications for fostering video-based learning of instructional strategies.