1 To improve the effectiveness of physical operations, we must adhere to the principle of pertinence.
In the teaching investigation, we found that many physics teachers assigned homework with unclear purpose and strong randomness. After a class, they blindly ask students to do a lot of exercises. If you ask the teacher why they assign these homework, many teachers often can't tell or explain why. The effectiveness of the homework can of course be imagined. So we ask every physics teacher to have a clear purpose when assigning homework. To remember, to understand, to use, to cultivate ability, to form habits, to stimulate interest, teachers should know fairly well, point clearly and prompt appropriately.
2. To improve the effectiveness of physical operation, we must adhere to the principle of proper selection.
The common problem now is that teachers assign homework for granted, and the workload is too large. Each student has several physics exercise books at the same time, which students are required to complete. Students are overburdened, exhausted and seriously short of sleep time, which affects their physical and mental health. Parents have great opinions. In addition, many students' exercise books are shoddy, with many questions, strange questions, wrong pictures and wrong solutions (answers), which makes students confused. Worried about affecting students' confidence and mood in learning. Our practice is to stipulate that only one physics exercise book can be used (the teacher chooses better); Control the amount of questions, students do physics homework after class for no more than 30 minutes; Moreover, the physics teacher should first screen the exercises in the exercise book, delete the difficult and eccentric questions, correct the wrong questions, wrong pictures and wrong solutions, and choose appropriate basic, conceptual, typical, inspiring and targeted exercises for students to complete after class.
3. To improve the effectiveness of physical homework, we must adhere to the principle of diversification of homework forms.
In addition to the traditional homework, teachers should also arrange some small papers, small productions, small observations, small investigations, small experiments and other homework to cultivate students' practical ability, scientific and technological awareness and interest in physics learning. We assigned students small papers: if there is no gravity, if there is no friction, atmospheric pressure and weather. (After learning relevant physical knowledge); Small production, such as letting students make their own scales, simple scales, parachutes, submarines, etc. Small observation of the first quarter moon and the second quarter moon, and observation of household circuits. ; A small survey of household appliances and environmental pollution sources in my community (village). Students usually show a high degree of enthusiasm and interest in these innovative and diverse assignments, and students usually show the wisdom and aura that impress teachers in their own assignments. For example, in an observation of the first quarter moon and the last quarter moon, some students concluded that the first quarter moon became the last quarter moon when it reached the western sky. When the last quarter moon reaches the western sky, it becomes the first quarter moon, and the observation is meticulous and unique. Excellent works in students' homework are actively recommended to be published in the school magazine or higher-level related publications to enhance students' self-confidence and pride.
4. To improve the effectiveness of physical operation, we must adhere to the principle of strict norms.
From the second day of junior high school, when assigning homework, teachers should strictly ask students to standardize the format, expression and problem-solving methods, so as to develop good homework habits. For example, junior high school students will encounter physical calculation problems after learning the first physical formula v = s /t in junior high school, so we require students to solve problems in strict accordance with the known problem-solving format, and consciously cultivate students' order and hierarchy in analyzing and solving problems; Moreover, students are required to use tools when drawing, and the writing of physical quantity symbols, physical formulas and characters should not be sloppy, but should be standardized and neat; The formation of these habits will benefit students for life.