Quadratic function topic board five characteristics: 1. intuitive operation, with teaching curriculum framework when most provinces! Comparison and discussion 2. Integration of graphics, the most complete! 3. a quadratic equation free input means, to generate a corresponding pattern, the most convenient! 4. Flip chart function, with the point with use, simple operation! The wall chart with solutions function to review the work fastest! Give you a new different quadratic function of teaching experience.