Purpose:In this regard the purpose of this study was to evaluation of effectiveness virtual mathematics teaching based on manipulative on mathematical learning in 6th grade elementary male students in 5th districts of Tehran in Covid-19 pandemic. Methodology: This study is a quasi-experimental research with pre-test and posttest experimental and control groups, in order to investigate the changes before and after applying the intervention in the experimental group and compare it with the control group. The population of this study included all 6th grade elementary male students in 5th districts of Tehran in the academic year 2021-2022. The sampling method was available sampling and the sample included 72 sixth grade elementary male students of Azadegan primary school which were randomly divided into experimental and control groups (36 students in each group). Findings: The results showed that as compared to the students in the control group who did not receive this program, teaching the experimental group that received this program by using the virtual mathematics teaching based on manipulative had a significant impact leading to an increase in the mathematical learning of the students (F=17.327, P<0.001). In other words, after adjusting the pre-test scores, the factor had a significant effect on the items being tested between the two groups. Conclusion: It can be suggested that the teaching based on manipulative can be used to teach virtual mathematics in primary schools. تفاصيل المقالة

Purpose: One of the problems of elementary school teachers is mathematics teaching that it has become a serious challenge in the Covid-19 pandemic, which has led to the quarantine of students and subsequent virtual education. The main purpose of mathematics teaching is to shape the conceptual understanding of mathematics.Methodology: This study is a quasi-experimental research with pre-test and post-test experimental and control groups, in order to investigate the changes before and after applying the intervention in the experimental group and compare it with the control group. The population of this study included all 6th-grade elementary male students in the 5th district of Tehran in the academic year 2021-22. The sampling method was available sampling and the sample included 72 sixth-grade elementary male students of primary school who were randomly divided into experimental and control groups (36 students in each group).Findings: The results showed that as compared to the students in the control group who did not receive this program, teaching the experimental group that received this program by using the virtual mathematics teaching based on manipulation had a significant impact leading to an increase in the mathematical learning of the students.Conclusion: According to the obtained results, in this educational approach, discovering solutions to problems and solving exercises by the students themselves effectively helps to improve their learning, thus it can be suggested that the teaching based on manipulation can be used to teach virtual mathematics in primary schools. تفاصيل المقالة