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二次函数是贯穿初高中数学教学的重点,也是历年高考的热点,更是学生学习中的一个难点。在初、高中阶段,教材对其处理方式是不同的。初中阶段,教材是在明处让学生在全体实数上感知二次函数的整体性态;而高中阶段,教材则在暗处用后继知识不断深化对二次函数的认识和运用。因此,在高中阶段,教师应引导学生打破思维定势,用后继知识不断充实对其新的认识和理解,化暗为明,让其丰富的内涵得到充分的展现和深化。
The quadratic function is the focus of mathematics teaching throughout the junior high school, and it is also a hot spot of the college entrance examination. It is also a difficult point in student learning. At the beginning and high school stages, the textbooks deal with different ways. In junior high school, the teaching material is to allow students to perceive the overall behavior of the quadratic function in the whole real number. In the high school stage, the teaching material uses the successor knowledge in the dark to continuously deepen the understanding and use of the quadratic function. Therefore, in the senior high school stage, teachers should guide students to break their mindset, use subsequent knowledge to constantly enrich their understanding and understanding, and turn darkness into clarity, allowing their rich connotations to be fully demonstrated and intensified.