Welding Technology Labor Open Class
2004-11-23
Tuesday and Mr. Wang went to listen to a labor technical lesson. This is the eleventh and thirteenth week of the Nanjing Middle School Middle School Group.
11
month
twenty three
day
At 8:30 in the morning, Jiangling High School, Research Course (Welding Technology) Coating: Shi **, participants are all districts and county education, electronic and electrical teachers (see: http: //njsjys.njet.net.cn/school /mzhd1.asp.
The process of class:
9 listening teachers were all lines of labor teachers. At 7:40 in the morning, wait for the car in the gate of the sectors of the Qingqiao City; Sustain; return after eating.
School and taught teacher impression:
Jiangpu Senior High School is a high school that is striving for four-star, and the hardware of the school is a bit like a general university (with a teacher says that this hardware standard can reach five-star).
The school is divided into two old school districts, more than 190 acres, 55 classes (public), 22 classes (private) in the new campus (public). There are more than 4,000 students, more than 700 teachers. There is also 400 people in Xinjiang class. Multimedia computers and projectors are available in each classroom.
Teachers who are teaching 2002 graduated from Nanshi University Electronics Technology, now the information technology group, usually mainly manage computers, etc., this is the first year to open labor classes.
Course content:
Number of students: 61 people. Ordinary classroom, there is a power outlet on each table, there are some equipment on the table, and there is a equipment box behind the classroom.
Objective: Proficiency in the use of common welded tools for tin wire, which can properly select and install electronic components and can engage in simple design work.
Teaching Tool: 220V soldering iron, solder, wooden board, rosin flux, file, multimeter, sharp pliers, biased pliers, tweezers, knives.
Steps: 1 Trimming the soldering iron with a file. 2 Multimeter Measure the resistance of the torch. 3 Clear the oxide layer of the welded portion. 4 soldering iron head tin. 5 Install the electronic components to the printed electrical board. 6 Trimming the solder joint.
Course effect:
Import: Teachers have taken out a light-controlled music flashing circuit, the music sounds, and the motor music is not ringing with paper. Students have been mobilized immediately. When the teacher asked: "You don't want to be a such circuit." The students shouted "Thinking". The excitement and excitement of the sound make the scene a bit touching.
Teachers use one, two minutes shortly, why didadly, why should the solder head, and then began to let students file. Thirty groups of students will open, sound, then smoke, there, the knife, the soldiers and horses, and they can't make up.
The teacher also can't control students to stop. The students also can't hear what the teacher is saying. It is groped to start the soldering.
When you go to class, most students do two problematic solder joints, the teacher's scorpion is also dumb.
Post-class Reviewed:
After class, the teacher who came to listen to the class was commented on this class.
First, I have affirmed the key points of the school, the teacher's preparation, the quality of the students. In particular, the interaction of some teachers and students has reached the requirements of "teachers to play as a TV program host role" as required by the new curriculum standard.
Insufficient: First, integrate the total power switch to the podium, and the teacher is unified, otherwise the situation cannot be controlled at all. That is, it is not possible to cope with the sudden situation, and thirty welding torches will be too high in the short-term voltage load.
Second, switch the knife to the steel saw blade, otherwise it will be cut to the school, and it is necessary to break the invincible needle. There are too many books on the three blackboards, just write a few points, if you can make a oral decision.
Four good teachers showed that they have to play a multimedia play before lecture, so that students know the correct way to operate; first the theoretical class, make a paving in the internship; Teacher demonstrates it to students.
Five can't go to class more than 60 people, the teacher can't get it. Divided into small classes, or separately
Practice guidance
teacher. Otherwise, the students have anything, and even specially destroy. In the class, there are students who take the knife to shine the entire welding gun. In other classes, students will insert two pointers of the multimeter into the power plug.
Although the six equipment is full, the key solder is not bought, and the quality is too poor and unlimited. It affects the experimental effects of students.
Seven experimental requirements are not specific. Students don't know what to do, teachers should clarify which components should be welded in the course of the course, which is to be sold.
Eight in a specific key step, it is clear and emphasized. For example, the heating of the torch must be made to clear how long it is heated.
Status quo of labor class:
Participating in the class is the labor teacher of each school, and they mention some relevant situations in this course:
I: All schools do not pay attention. All schools in the urban area will definitely do not open the technical class again, and all in high school and second grade can be opened. Starting classes take the first grade map, the second grade electronic technology is main. The textbook used is the Subject Text from Jiangsu Education.
Second: The power of teachers is weak. The labor technicians of each school are small, and some are incorporated into the information group.
Labor
Teachers are older "old old lady".
Three: New curriculum reform. There are several teachers to mention new curriculum reform next year, and everyone's default perspective is the information group of information technology belongs to the school; general technology belongs to the labor group of each school. But so far, there is no training in system. Some teachers first saw the general technical textbooks after the new curriculum reform, the first resolute reaction is: "No one can do it in this textbook." "I don't know how to teach."
But everyone mentioned the college entrance examination, saying that if general technology and college entrance examination hooks all OK, in fact, the school is full of college entrance examination baton.
4: Teaching. Generally, when you create a new labor classroom in the school,
Labor
Teachers can strive for schools to equip themselves. For example, install a total control switch on the podium. If you miss this time, then add teaching aids later, "it is rare to know how difficult". There is a teacher says that in order to buy a million electric meter to the labor class, he has to top the pages of the textbook to the principal on the textbook. This is the requirements of the textbook, not to buy it. of.
Five: Multimedia. Although it is an older teacher, they consistently recommend using multimedia playback form to assist student experiments, they generally ask the school to provide multimedia to the labor classroom.
sense
Xie Wang
Teacher offers a chance, and it is recommended to do more activities later.
