初中化学是九年制义务教育的必修课程,是现代公民素质教育的基础内容之一。如何使所有智力正常的学生在符合教育教学规律的前提下,完成教学大纲中规定的教学目的任务,是摆在中学化学教学与教研工作面前的一项重大课题。几年来,各地有志于教学改革的教育工作者,应用布卢姆的“教育目标分类学”理论,对教学目标进行分类,并结合其“掌握学习”的思想,创造性地建立了一种崭新的教学方式——目标教学。实践证明,这种教学方式确是实现大面积提高教学质量的重要途径之一。目标教学的实施是以单元作为教学的基本单位的,但是单元的基础仍是每堂课,单元教学总是分解为课堂教学来进行的。因为课堂教学是完成教学任务的 Junior high school chemistry is a mandatory course for nine-year compulsory education and one of the basic contents of quality education for modern citizens. How to make all students with normal intelligence comply with the rules of education and teaching, and complete the task of teaching purpose stipulated in the syllabus is a major topic in front of chemistry teaching and teaching research in middle schools. Over the past few years, educators throughout the country who are interested in teaching reform have applied Bloom’s theory of “educational target taxonomy,” categorizing teaching goals, and combining their “mastery learning” ideas, creatively established A new teaching method - target teaching. Practice has proved that this teaching method is indeed one of the important ways to achieve large-scale improvement of teaching quality. The implementation of the target teaching is based on unit as the basic unit of teaching, but the basis of the unit is still each class, unit teaching is always decomposed into classroom teaching. Because classroom teaching is the task of teaching