تحسين بناء الفهم الجبري وترقيته لتلاميذ الصف الثاني الإعدادي في بيئة تعلم تستند إلى التمثيلات الرياضية
The present research aims to investigate the effectiveness of employing a mathematical representation model in the context of a learning environment for teaching 2nd prep algebra, in promoting students’ algebraic understanding. An experimental treatment for teaching 2nd prep algebra, based on Van de walle model of mathematical representation, was designed and implemented throughout 2018- 2019 school year. Ninety 2nd prep students participated in a quasi-experimental design study with two groups (experimental vs comparison). Data of algebraic understanding was collected using a test combines multiple tests: understanding of algebraic concepts, procedural understanding, and algebraic problem-solving tests. The results of data analysis using T-test revealed statistically significant differences, between the scores means of the two groups, in favor of the experimental group, for the overall understanding test and for each test separately. (Published abstract)