Boris Koichu

Creating effective learning environments in heterogeneous mathematics classrooms remains a persistent challenge. This exploratory study examines how realistic representations can support learners across achievement levels. Through a two-part investigation, the study first conducts an a priori analysis of two representation-oriented activities to articulate the roles of realistic representations and then explores how teachers view such roles as supporting low- and high-achieving students. The initial analysis identifies four roles of realistic representations: motivating , initiating , connecting , and applying each mediating differently between everyday and mathematical discourses. The subsequent examination through case studies of two teachers implementing these activities in their classrooms shows that one teacher recognized motivational benefits for low-achieving students, whereas the other highlighted their value in encouraging connection-making for high-achieving students. We discuss how explicating the multifaceted roles of realistic representations can help teachers and teacher educators design more inclusive mathematics instruction.

Metacognition and self-assessment (SA) play a significant role in teachers' professional learning. However, little is known about the interrelationship between these two constructs among teachers, particularly in their role as learners in technology-based contexts. The study goal is to characterize the interplay between metacognitive and SA skills of in-service mathematics teachers who systematically take part in online problem-solving forums (PSFs) as learners. Employing a qualitative approach, the study focuses on two groups of secondary school mathematics teachers (10 participants total) who took part in a 2-year academic professional learning program that included a geometry course. As one of the course requirements, the teachers worked in groups of five to solve three challenging geometry problems. The course instructor provided metacognitive guidance as needed throughout the process. The main data consisted of six PSF threads (three for each group), with posts in the threads serving as the analysis units. Each post directly related to the problem-solving process was assigned a code based on components of metacognition or SA. Findings suggest that although the course instructor's interventions faded over time, all PSFs were rich with metacognitive and SA assertions. This study elaborates on the complex relationship between metacognition and SA, with each construct mutually influencing and enhancing the other. The findings suggest that while metacognition and SA can operate as dynamically interacting processes, they also have the capacity to converge. The study further underscores the significance of online PSFs, indicating their potential as a setting for supporting teachers metacognitive and SA skills.