Classroom teaching is an important form of teaching work and the main channel to implement quality education. However, in the current high school mathematics teaching, the traditional educational concept still occupies the classroom: on the one hand, the teaching quality is not high because of the low efficiency of the classroom; On the other hand, under the baton of "College Entrance Examination", in order to make up for the lack of classroom benefits, the phenomenon of extra-curricular overtime is more prominent; In addition, the newly promulgated high school mathematics syllabus has greatly reformed and adjusted the old syllabus, which requires students to master basic knowledge. So how to improve the effectiveness of high school mathematics classroom teaching? The author summarizes as follows: 1. Create happy learning situation to improve the effectiveness of classroom teaching. In classroom teaching, we can create happy learning situations by creating fairyland and interesting places. Wonderland: Curiosity can make students have a strong interest in learning and a strong desire to explore. Interesting land: interest is the tendency of people to like certain activities or try to understand something. It is the most effective motivation to promote and motivate students to learn. Frequently introducing some vivid stories in class will make students feel interesting. Second, using the Geometer's Sketchpad to improve the effectiveness of classroom teaching "Geometer's Sketchpad" is an excellent educational software developed by American Key Curricu lum Press Company. It is one of the softwares popularized and used by the National Center for Computer Education and Research in Primary and Secondary Schools. The "Geometer's Sketchpad" greatly surpasses the function of the traditional blackboard. It breaks the model that only a piece of paper and a pen are needed for mathematical research and only a piece of chalk, a mouth and a blackboard are needed for mathematical teaching. This is a great praise for teaching ... (this article * * * meter 1 page) [continue reading this article].