二次函数及其图像,教材共分四节,依次是二次函数、二次函数y=ax~2的图像、二次函数y=a(x-h)~2+k的图像和二次函数y=ax~2+bx+c的图像.由浅入深,由特殊到一般,依次展开,便于学生理解和掌握.从某种意义上说,教科书与教师是一般和特殊的关系.教科书是由专家编订的,在内容的编排上具有明显的阶梯性和连贯性,对教学有普遍的指导意义.具体到每一位教师,在自己的课堂上,完全可以根据需要对教材进行整合,做到既依托教材又超越教材,使之更适合学生的学习. Quadratic function and its image, the teaching material is divided into four sections, followed by a quadratic function, quadratic function y = ax ~ 2 images, quadratic function y = a (xh) ~ 2 + k image and the quadratic function y = ax ~ 2 + bx + c images from shallow to deep, from the special to the general, in order to expand the understanding and mastery of students in a sense, textbooks and teachers is a general and special relationship textbooks by experts Compiled in the content of the arrangement has a clear ladder and coherence, teaching a general guide to the specific to each teacher, in their own classroom, can be based on the need to integrate teaching materials, so that both Relying on teaching materials and beyond the teaching material, making it more suitable for students to learn.