Rectangular coordinate blackboard is a magnetic green board with a 5cm grid etched on the surface. The origin and ± X and ± Y axes are marked in bold red and blue for students to quickly locate. Equipped with 20 colored magnetic nails and erasable pens, teachers can instantly plot point, line, and function images; The side frame is equipped with a telescopic slide rail, which can suspend dynamic curve ropes and visually demonstrate slope, symmetry, and translation. The board back universal bracket supports horizontal and vertical rotation, meeting the needs of group exploration and classroom presentation, and easily achieving coordinate teaching of "one board, multiple scenes".