contrary class meaning in English

对立组
反组

There are some contrasts in the experiments . in experimenting classes , the writer uses discussing mode , but in the contrary classes , the writer uses traditional modes
实验研究采用对比设计，在控制其它变量的条件下，实验班采用构建的导学- -一讨论模式和诱思?探究模式进行授课，对照班采用传统的教学模式进行授课。
After the experiment , the writer will compare the two different scores from two different classes . we will find that the score from experimenting classes is much higher than the contrary classes
实验结束后，统一测验实验班和对照班的物理成绩，通过对两个班的物理成绩平均数差异进行显著性检验，发现实验班的物理成绩明显高于对照班，且有显著差异。