flipped classroom
noun [ C usually singular ] education specialized uk/ˌflɪpt ˈklɑːs.ruːm/ us/ˌflɪpt ˈklæs.ruːm/
翻转课堂（一种教学方法，让学生首先通过网络自学一个新的题目，然后在课堂上讨论）
a teaching method in which students first learn about a new subject at home, especially online, and then have discussions on it in class