This book starts from the basic principles of education and teaching, combined with relevant psychological research results, and focus on the most basic ways and methods in mathematics education, in order to give beginners in mathematics education a clear understanding of mathematics teaching, so that they will not be at a loss when they first start working. After that, in their daily mathematics teaching work, they always know whether the measures they take meet the fundamental requirements of mathematics education and whether the path they take is always in the right direction.