Make full use of teaching space and push and pull the blackboard to help

When we were children, the blackboards we used were ordinary blackboards mounted on the wall. With the development of technology, various blackboards emerge in endlessly. Many schools have begun to use sliding blackboards as teaching tools, which not only make full use of the teaching space, but also Saves time and reduces dust
Generally, the push-pull teaching blackboard is divided into four pieces, which can be exchanged up, down, left and right, so that the teacher has enough space when writing on the blackboard, and there is no need to wipe the blackboard frequently, and it can also be used Students have enough time to record the content written on the blackboard and think about it. When they finish writing one piece, they can push and pull it with their hands to replace the next piece. This is very convenient. The original fixed blackboard not only cannot be moved, but also requires the teacher to erase the writing on the blackboard from time to time. , interrupting teaching time
Using a push-pull track, the push-pull blackboard can be easily pulled to realize the operation switching between blackboards, which is simple and convenient, and also makes full use of the space