Glass Blackboard: Made of frosted glass, it has begun to fade out of the market due to its fragility, large amount of dust, and inconvenient transportation.
Stave Music Blackboard: Blackboard is used in music. As the name suggests, this kind of blackboard has become a music blackboard. This blackboard was developed by Soviet scientists and technicians to successfully sing a blackboard. On this blackboard, there are notes. When the music teacher touches the music symbols with the pointer, the blackboard emits a tone that is consistent with these notes. If a piece of music is written on the blackboard, when the pointer touches the note of the piece, the music blackboard will play. Listening to the song.