1, general physics: the teacher mainly explains knowledge points and examples, and tends to understand. Very detailed and clear, all compulsory elective contents are available, and the duration is basically within 10 minutes.

2. A little girl who is not like a teacher: Teachers tend to explain by thinking, and explain the topic by introducing various examples, which makes the topic very vivid and easy to understand. Most videos are about 6 to 30 minutes long.

3. Teacher Chen knocks on the blackboard: the teacher mainly explains big questions and experimental calculation skills. Most videos are about 5 to 20 minutes long.

4, Dachuan teacher biubiubiu: This teacher mainly contacts physics in life to explain, which can be used to cultivate interest in physics, and the duration is basically within 15 minutes.