Transformation of Algebraic Language to Geometric Representation Through Problem-Solving and Collaborative Work was authored by a group from Chile. The authors are: Cristian Reyes, Juan Pablo Osorio, Carmen Gloria Espinoza, Carla Medina, Victoria Arriagada, and Paula González.
The case study examines a lesson from Santiago, Chile and focuses on:
- Implementing problem-solving activities for students to collaborate in discovering the factoring of algebraic expressions through geometric representations.
- Encouraging students to communicate and discuss ideas for understanding and solving the problem, through collaborative work in small groups.
The video is made up of three different parts:
- Part 1: Formation of random work groups, socialization of the task and the dynamic of work. (00:11 – 03:32)
- Part 2: The role of the teacher while the students solve the problem. (03:32–22:35)
- Part 3: Presentation of the strategies and solutions obtained by the groups during the resolution in plenary discussion. (22:35 – 40:13)
The full case study is available in the attachments section. The comments on the video have been added by the OECD on behalf of the authors. The blue comments relate to the mathematics, the yellow comments to the teaching moves, and the brown comments are questions to consider. We invite you and your peers to add your own thoughts and comments on the video at different timestamps, or build on the ideas that are already there, in order to help foster a global exchange on mathematics teaching.
