1. 1 basis

Fundamentality includes two meanings: first, design problems should reflect the needs of students' development and let students gain something; Second, based on students' existing experience, let students have the ability to solve problems. The problem of design should not only make students jump out to feel, but also have room for development; Let the students "jump" and you will feel the possibility of success.

1.2 science

The knowledge we impart to students should be scientific knowledge. When asking questions, we should pay attention to the accuracy of their contents. Secondly, design problems should also be integrated into the elements of scientific methods, so that students can learn to be modeled and idealized; The problem of design should also pay attention to scientific ideas and values, and reflect the requirements of the new situation for students' development.

1.3 pertinence

Around the teaching objectives, according to the actual situation of students and the key and difficult points of teaching materials to design. The questions designed are clear in meaning and the language is coherent and concise, which helps students to understand concepts, identify problems, correct mistakes and improve cognitive structure. Never embarrass students with unnecessary questions.

1.4 inspiration

The design questions are too simple to be answered without thinking, which can not stimulate students' interest in learning and develop their thinking ability. Simple question-and-answer or "yes or no" questions will only make students lazy, and will damage their thinking quality in the long run. Teachers should grasp the internal contradictions in teaching and seize the opportunity.