“先学后教”是指教学活动中实现教学以教师为中心向以学生为中心的转变,学习过程由学生的被动学习变为主动的自我建构,教学过程由教师的单向传授变为师生的双向互动和多向交流,是当代建构主义教育心理学思想的充分体现。 “Learning before teaching” refers to the transformation from teaching-oriented teaching to teacher-centered to student-centered learning. The learning process is changed from passive learning to active self-construction. The teaching process is changed from one-way teaching by teachers to teachers Students two-way interaction and multi-directional communication, is the Constructivism educational psychology fully reflect the thought.