The invention relates to a teaching tool, in particular to a blackboard. The light-emitting blackboard comprises a blackboard body. A pressure sensor, a controller and an illumination lamp which are sequentially and electrically connected are arranged in the blackboard body. The pressure sensor detects and transmits pressure to the controller, and the controller controls the illumination lamp to work, wherein the pressure is applied to the blackboard body through chalk. The area where the pressure is located is detected through the pressure applied to the blackboard through the chalk, the controller is used for controlling the illumination lamp in the area to be turned on, and therefore the illumination of the blackboard can be improved while a teacher uses a multimedia teaching tool projector without turning off a lamp in a classroom, the work efficiency of the teacher is improved, the attention of students can be more concentrated, and meanwhile, due to a detachably charging solar cell panel, a power source is effectively saved.