Foldable keyboard for information technology classroom

The foldable keyboard for the information technology classroom comprises a shell, a second bottom plate, a first bottom plate, a dust collection box, a ventilation opening, a cleaning brush and a second sliding sleeve, sliding rods are fixedly connected to the two sides of an inner cavity of the shell, the two sliding rods are each sleeved with a first sliding sleeve, a movable plate is fixedly connected between the two first sliding sleeves, and the movable plate is fixedly connected with the ventilation opening. A second bottom plate is fixedly connected to one side of the moving plate, second sliding grooves are formed in the bottoms of the two sides of the second bottom plate, second sliding rails are arranged in the second sliding grooves, the bottoms of the second sliding rails are fixedly connected to the bottom of an inner cavity of the shell, a first bottom plate is arranged at the top of the inner cavity of the shell, and keyboard plates are fixedly connected to the opposite sides of the first botto