Compasses for teaching

The utility model provides a pair of compasses for teaching, which belongs to the technical field of teaching tools and comprises a fixed mechanism and a movable mechanism which are connected with each other. The fixing mechanism comprises a suction cup base, a suction cup and a fixing part, the linkage piece is provided with a first end accommodated in the accommodating cavity and a second end extending out of the accommodating cavity; the sucker body is connected with the second end of the linkage piece; the sucker wrench is connected with the first end of the linkage piece, is connected with the sucker base, is provided with a handheld part located outside the containing cavity and is used for providing pressing or lifting acting force for the linkage piece and the sucker base; one endof the elastic body is connected with the sucker wrench, and the other end of the elastic body is connected with the sucker base. The movable mechanism comprises a rotating arm which is rotatably connected with the sucker bas