No abstract

Under the current situation of epidemic prevention and control, to ensure the continuous progress of student learning, Chinese Ministry of Education put forward the initiative of "suspension of classes without suspension of school". Primary and secondary schools have adopted online learning at home for students to "open schools in the cloud. There is a big difference between online learning and classroom learning. In this process, problems such as increased teaching burden of teachers, lack of interaction between teachers and students, and students' lack of active learning are also exposed. Video learning are a new type of teaching resource. It can improve the efficiency of primary school mathematics teaching by using video learning reasonably. Based on the above analysis, the purpose of this research is to investigate the development of primary school students' logical reasoning ability through the use of video leanings for auxiliary teaching. The research method adopts the experimental method and is divided into the experimental class and control class. The subjects of the study were 72 students from a primary school in Indonesia. Experimental results show that video learning for auxiliary teaching can effectively develop students' logical reasoning ability.

The intersection of two lines was studied in grade 7, junior high school. This geometry material is very important, as the basic 3 dimensions that students will learn at the high school level. Exploring and persuading the two properties of vertical lines is the most difficult thing in teaching. Traditional teaching uses methods such as observation, drawing, measurement, and comparison to derive the properties of vertical lines, and expresses the properties of vertical lines in finer words, which easily create greater difficulty for students to understand. This research uses research and development methods, tries to use mathematical software to teach lines and angles and optimizes the basic concept of lines and angles. The results of this study provide specific references to the graphs and geometry of junior high school mathematics.