教学设计的重要组成部分就是教学策略,它是对教学活动的程序、方法、形式、媒体等的整体考虑,目的就是在相关的理论指导下完成特定的教学任务。一般教学策略在选择方面应遵循一定的原则,如灵活性、可操作性以及情境性等原则。生物教学中,在选择教学策略时,应该围绕生物学核心概念进行教学设计,并要联系教材知识的呈现方式,结合学生的认知特点。一、对比策略为什么要采用对比策略?原因很简单,那就是初中生 An important part of instructional design is the teaching strategy. It is an overall consideration of the procedures, methods, forms, and media of teaching activities. The purpose is to complete specific teaching tasks under the guidance of relevant theories. General teaching strategies should follow certain principles in terms of selection, such as the principles of flexibility, operability, and situationality. In biology teaching, when choosing teaching strategies, teaching design should be centered around the core concepts of biology, and the way of presentation of teaching materials should be linked to students’ cognitive characteristics. First, why contrast strategy should use contrast strategy? The reason is simple, that is junior high school students