[案例 ]十五年前 ,我正在教初中。也是这样花繁叶茂的初夏时节。一天 ,我和我的学生们进行完大课间活动 ,一起走回教室———第三节是我的语文课。同学们玩得很开心 ,个个兴致勃勃 ,有说有笑。可是 ,一进教室 ,我们都愣住了。不知何时 ,教室后边坐满了听课的老师 ,足有二、三十 [Case] ​​Fifteen years ago, I was teaching junior high. This is also the first leafy flower season. One day, I and my students completed the great recess activities, walked back to the classroom --- the third quarter is my language class. The students had a great time, all of them were excited, talked and laughed. However, as soon as we entered the classroom, we were shocked. I do not know when, after the classroom full of lecture teacher, enough to have two or thirty