一、提出问题在初三年级《生理卫生》教学中,大纲和教材均没有要求进行“血型判定”的学生分组实验,这对于学生学习第四章循环系统是个很大的缺陷.从以往这一章的教学情况看,第一节的“输血和血型”部分是个难点.学生对该部分内容难以理解,难以记忆,难以运用.这部分的内容成为难点,并不是学生对此内容无兴趣,而是对抽象讲述的教学方法无 First, raising questions In the third grade “Physiological Health” teaching, the outline and textbooks did not require the “blood type determination” of the student grouping experiments, which for students to learn the fourth chapter of the circulatory system is a big flaw .From the past Chapter teaching situation, the first section of the “blood transfusion and blood type” part is a difficult .Students of the part of the content is difficult to understand, difficult to remember, difficult to use .This part of the content becomes a difficult point, not the students are not interested in this content, and It is a teaching method of abstraction