一年一度的中考复习再次拉开帷幕。有关中考复习的有效性问题也同时引发广泛的关注和深刻的探讨。其实,复习是否有效,复习课是重要的一环。通过有效的复习,达到温故而知新,使学生在知识的掌握和知识的运用上有新的突破;在情感、态度、价值观等方面有新的提升。下面我们以一次中考复习研讨会上呈现的“同课异构”复习课:《浮力》一课为例,来初步剖析科学复习课应掌握的要领及对策。一、课堂教学片断和点评 The annual exam review opened again. The validity of the exam review also aroused widespread concern and profound discussion. In fact, the review is valid, review class is an important part. Through effective review, we can learn new knowledge and make new breakthroughs in the mastery of knowledge and use of knowledge. There is a new improvement in emotion, attitude and values. Below we take a review of the seminar presented at the “lesson heterogeneous ” review: “buoyancy” class as an example, to preliminary analysis of the essentials of scientific review should be and countermeasures. First, the classroom teaching pieces and comments