Experimental group one and control group learned the materials of experimental group and control group . when group two were learning , we didn " t tell them that they were going to have a test , only explained to them the study method and introduced the difference of two kinds of knowledge points . they were going to be given a test after the same period of time 实验的过程是，安排高三的两个班分别学习实验组材料和控制组材料，间隔相同的时间后，对两组进行测试;安排高一的三个班学习材料，分别作为实验一组、实验二组和控制组，实验一组与控制组的学习与前者一样，当实验二组学习时，也不告知将要测验，但给他们讲解学习方法，介绍两个知识点的差异，三天后进行测验。
