课堂前测是指在学校教学过程中,教师在上课前的一段时间内,通过不同的调查方式,对学生进行相关知识和方法的预先测试.也就是在学习新知识之前对学生的认知结构的调查,然后有针对性地设计教学活动,并提出相应的课堂教学策略.教学案是教师的教案与学生的学案二者融为一体的教与学方案,使用教学案教学,目的是促进课堂上师生的良好互动,在教师的指导下,提高学生课堂学习效率.我们在教学中经常有这样的疑问:为什 Pre-classroom test refers to the process of teaching in the school, teachers in a period of time before class, through different ways of investigation, students pre-test knowledge and methods that is, before learning new knowledge of students cognitive structure , And then targeted teaching activities and put forward the corresponding classroom teaching strategies.The teaching case is a teaching and learning program that integrates the teacher’s lesson plan and the student’s case plan. The teaching case teaching is used to promote Good interaction between teachers and students in the classroom, under the guidance of teachers, improve the efficiency of classroom learning. We often have such questions in teaching: Why