Educator Bruna believes that any knowledge can be taught to any student of any school age. Students of our time need higher-order thinking to analyze and solve the problems around them. 
The nature (characteristics) of knowledge points can only be presented under certain conditions, and the knowledge of presenting properties (characteristics) can be used to describe the phenomena of things, and then explain the essence of things.
The nature (characteristics) of knowledge points can only be presented under certain conditions, and the knowledge of presenting properties (characteristics) can be used to describe the phenomena of things, and then explain the nature of things and the laws of their change and development, and be used to demonstrate and demonstrate the causes, processes and results of the change and development of things.
The question contains the complete relationship of the subject to determine the discipline concept that needs to be used, the discipline concept determines the direction, process and goal of answering the question, and the discipline concept also clarifies the level and structure of the specific knowledge points used to solve the problem.
The complete specific relationship of the situational material becomes the condition for the specific knowledge point to present its nature (characteristics), and the nature (characteristic) of the specific knowledge presentation is used to describe the specific relationship of the specific material, explain the nature and law of the specific relationship of the situational material, and demonstrate the cause, process and result of the questioning requirement on this basis