Auxiliary device for junior high school teaching

The utility model discloses an auxiliary device for junior high school teaching. The device comprises a rotatable display platform, a base, a telescopic pull rod and liftable bottom wheels, the liftable bottom wheels are rotatably mounted at the bottom of the base; one end of the telescopic pull rod is fixedly mounted on one side of the base; wherein the rotatable platform is fixedly mounted on the base; the liftable bottom wheel comprises a rotating wheel, a sliding block, a fixing structure and a guiding structure. Sliding cavities are formed in the two sides of the base. The sliding cavityis provided with a sliding way communicated with the outside, the sliding block is installed in the sliding cavity in a sliding mode and fixedly provided with a connecting shaft, the connecting shaftpenetrates through the sliding way, a rotating wheel is installed at the end of the connecting shaft in a rotating mode, and the guide structure comprises a guide block, a guide pipe and a spring andis simple in structure and