小学升初中时的优质生源多被私立及城镇重点中学择校录取,本地优质生源大大减少,他们来自全国各地,风俗习惯各异,性格各不相同,自我保护意识很强,平时在班级活动中常处于半封闭状态,学生相互交流的机会较少,不会学习。更有一些学生是从初二或初三开学时中途转入的,原有的科学版本与浙教版完全不同,长此以往他们就会对学习科学缺少兴趣,也就使学生有了厌学情绪。因此,对他们来说,合作学习显得尤其必要。 Primary and secondary high school junior high school students were mostly high school students selected by private schools and key schools in cities and towns. Local quality students greatly reduced. They come from all over the country. They have different customs and habits, different personalities and strong self-protection. Usually, In a semi-closed state, students have fewer opportunities to communicate with each other and can not learn. Some students even switched from the beginning of the second or the third semester. The original version of science was completely different from the version of the Zhejiao Version. From then on, they lacked interest in learning science, which also made the students feel tired of learning. Therefore, for them, cooperative learning is particularly necessary.