In addition to "double basics", we should also pay attention to: (1) every class should focus on cultivating students' learning interests, habits and methods, and it is more important to implement this main goal than to teach students to master knowledge. (2) Every class should pay attention to the teaching goal of transforming mathematical knowledge into practical ability. When formulating and grasping the learning objectives in class hours, we must focus on the cultivation of students' sustainable development ability, ignore the framework of "two basics" objectives and pay attention to the integrity and comprehensiveness of the objectives.