“有效教学”追求的是让学生在最短时间内获得最佳的学习效果。“有效教学”是教学手段、教学策略,也是教学的终极目标。笔者以“盐类的水解”为例来设置知识阶梯,分散难点,循序渐进地推动知识的进展,将难于理解的电解质溶液知识变得易于掌握,实现有 “Effective teaching ” The pursuit is to allow students to get the best learning results in the shortest time. “Effective teaching ” is a teaching method, teaching strategy, but also the ultimate goal of teaching. The author uses “salt hydrolysis” as an example to set the knowledge ladder, disperse the difficulties, and promote the progress of knowledge step by step, will be difficult to understand the knowledge of the electrolyte solution to grasp, to achieve