一、精心编制学案学案是教师精心编写的指导学生自主学习、自主探究、自主创新的方案,是由学习目标、知识结构、认知方法和技能训练四个要素组成。设计学案时,教师要从教材的编排原则和知识系统出发,对大纲、教材和学生的认知水平等进行分析研究,尽量使学案重点突出,难点分散。教师的着力点应放在设计学生的“学习活动”上,它包括学习内容和学法指导,如观察、联想、对比、归纳等;还要拟定培养学生何种思维方法,训练何种能力,指导何 First, the elaboration of case study case is carefully prepared by the teacher to guide students to independent study, independent exploration, independent innovation program is composed of learning objectives, knowledge structure, cognitive methods and skills training four elements. Design case, the teacher should start from the teaching materials and principles of knowledge system, the outline, teaching materials and students’ cognitive level analysis and research, as far as possible to highlight the case, the difficulties scattered. Teachers should focus on the design of the students “learning activities ”, which includes learning content and learning guidance, such as observation, association, contrast, induction, etc .; also develop students what kind of thinking, what kind of training Ability, guidance