Shun Net -
in the dike road To learn, teachers and students take use of multimedia blackboard. Reporter Huang Zhongming in the Ji'nan high tech Zone Experimental Middle School campus, there is a special wall, the materials used are not common brick and stone, but the compound wood blackboard which has been eliminated. Zhao Huiqing, a 46 year old teacher, often stops in front of the students' graffiti walls when he goes for a walk in school. In his 21 years of teaching career, the change of a small blackboard led to his heart, learning and teaching career through wood ink blackboard, cement black lacquer blackboard, glassboard blackboard, touch electronic whiteboard.Amp; hellip.amp; hellip from which he saw his learning and teaching process, and saw a big step in technology. The more humane teaching aids bring convenience to teachers' teaching and students' learning.
30 years ago the cement blackboard.Amp; mdash.amp; mdash
the blackboard reflective front row can't be seen on both sides of the board
in the 80s of last century, Zhao Huiqing remembered that in the classroom of his own school, the blackboard written by the teacher was the first blackboard of the ink on the board. This ink board is too smooth to write, it is too rough and more chalk, so every blackboard is in a different state. Chalk is also precious in those days, so the teachers are saving money. Even if you are saving money, you need two or three chalks for a lesson.
the condition is a little better. The classroom has been replaced with second generations of cement blackboard. This blackboard is painted on the white wall and then painted with black paint. It is not easy to damage relative to wood blackboard. The plane is smooth and the teacher is easy to write, but the biggest problem that the students face is both sides. There is a phenomenon of reflection. Students sitting on both sides of the classroom, especially the first two rows of students, can not see the words on the blackboard. They all have to open their eyes and twist the body and head to note the notes. When the black paint on the blackboard falls off, most of the students sitting in the back row can't see clearly. In order to see the teacher's blackboard writing, many students had to look down and return to their seats.
Yuan Wei, a Ji'nan second teacher, recalled that the blackboard used when she had just joined the work needed to be painted regularly. If the paint was not painted, the blackboard was shallower, and the written chalk students were not clear. So during the holidays, the blackboards of all classes need to be painted. When the school begins, students can use.Amp; lsquo new blackboard.Amp; rsquo.
20 years ago the wool glass blackboard.Amp; mdash.amp; mdash
the end of the chalk fly, the fat sea water is the mark of the teacher of the pharyngitis teacher's
1993, the 24 year old Zhao Huiqing ended the more than 10 years of cold window reading, and the predecessor of the High-tech Zone Experimental Middle School.Amp; mdash.amp; mdash calendar. . As the school had just moved to the new site, he was pleased to find that the blackboard was transformed from the former common blackboard and wood blackboard to the wool glass blackboard, with a slight improvement in the reflective phenomenon, easy to write and better wiping. But when you clean the blackboard, the chalk dust will still diffuse and go straight to the human nostrils, which makes people breathless.
and as a math teacher, the analytical formula is more complex, sometimes to solve a problem to be full of the whole blackboard, a lesson at the most time to wipe four blackboards, the whole class finish, the head on the body is all chalk end, inhaled into the nasal cavity and trachea, very difficult. Zhao Huiqing remembered that, like him, many teachers were suffering from pharyngitis. In the office, a little water in a fat sea is basically a standard on each teacher's desk. At that time, the condition was not like today. There is nothing in the golden throat, and the teachers can only use plenty of water to relieve the symptoms of throat discomfort. During the interview, Zhao Huiqing recalled the scene at that time and smiled and shook his head.
besides teachers suffering from chalk, the students sitting in the front row are also troubled. The book often ends with chalk ends. Therefore, how to minimize dust when cleaning is the problem that teachers often exchange and discuss after school. In order not to let the chalk fly everywhere, they also take a variety of ways, from the original brush to soft brush, wet cloth instead of brush and so on, but at the same time, it also faces various problems, such as when the soft brush is wiped out, dust adheres to the surface of the blackboard, and appears a piece of white, and the effect of writing is not good. Wipe with wet cloth, wet when it is very bright, but after drying, there is a lot of dust on the blackboard, and then the writing board is hard and not easy to use.
11 years later, in 2004, the water brush blackboard was introduced into the classroom to solve the problem of dust floating everywhere. It saved the manpower of the blackboard. It was not easy to reflect the light. The students were no longer worried about the words on the blackboard. From all angles, they could basically see the handwriting on the blackboard.
water brush blackboard also has disadvantages. Every time you brush the blackboard, the blackboard on the blackboard is gone from top to bottom. For this reason, every time the teacher cleans the blackboard, he asks, "is this part written down?" Students who didn't have time to write the blackboard were often asked to take notes after class.
the touch blackboard.Amp after 2013; mdash.amp; mdash
how long the courseware will be animated. How long will the courseware save for as long as
and now the school blackboard has turned into a liquid crystal touch machine. The teacher writes the book on the LCD screen directly on the LCD screen instead of the traditional chalk. At the same time, the background color of LCD screen can be set by itself, such as dark blue, green and black. Each page book on the LCD touch screen can be saved. When reviewing, the teacher can turn over the page before looking for the written sheet. The students have no time to record the contents of the book. The humanized new blackboard has brought convenience to teachers and students.
touch screen has a large screen, and a computer connection, you can display some courseware in the form of animation. For example, we can make a function image through the software. After putting the function into the computer, we will automatically generate an image and show the process of the image in the form of animation and let the students feel personally. The process of producing the image. Zhao Huiqing said that this combination of video, pictures, animation and other forms of teaching attracted students' attention.
teachers do not have to take chalk and teaching books in class. As long as a U disk and an electronic induction pen with a length of about 10 centimeters long, even some school electronic induction pens can be saved. The new blackboard with a strong sense of science and technology has ended the dusts of teachers and students in the teaching. With this blackboard, the keyboard knocks, the teacher does not have to go to every class again and again to copy the questions to explain, the students do not have to worry about the book will be erased in a moment, how long the courseware want to save how long.