1.Constructivism core 

       The core of constructivism is a sentence: taking students as the center, emphasizing the initiative of learners, and believing that learning is a process in which learners generate meaning and construct understanding based on the original knowledge and experience, and this process is often completed in the social and cultural interaction.

          2. Let's talk about its historical origin first

          In the last century, the stimulation of behavior-reaction theory is quoted on the teaching, led to the teacher teach students to listen to the formation of the teaching mode, then we found this model is very inflexible, teach students innovation is not enough, so we began to criticize and looking for a new teaching idea. At this time, Piaget's theory (theory of schema, assimilation, adaptation, balance) was discovered, And then it drew a lot of research, Kolberg made further research on the nature of cognitive structures and the conditions under which their development, Stenberg and Katz explore how individual initiative in cognitive processes, At this time, Vygosky founded the "Theory of Cultural History development", The "recent development zone" (that is, there are two levels of learning, One is the level that the students can reach by themselves, The other is the level that students can reach with the help of others, These two levels are the nearest development zone.) This concept has greatly developed the constructivism. Therefore, in the 1980s and 1990s, constructivism was very popular. It was spread to China in the 1990s. Many scholars have done research on constructivism and compared how to resist. And in 2003, China's curriculum reform was ninety, with constructivism theory as the guiding theory.

               3. Theoretical content

       ① View of knowledge (knowledge is not the final expression of the real world, which means that there is no end to knowledge exploration. Do you think that the knowledge you know now is the absolute truth? No, the geocentric theory has been overturned.)

    ② Student view (students are not empty head into the classroom, of course, also with the knowledge learned before ah!）

   ③ Learning view (learning four elements: situation, collaboration, conversation, meaning construction, translation is to combine the actual situation, and then group study to discuss and study, and finally let the students understand the essence of things. Do you think learning from the unification of Qin Shihuang is just to let you understand his tyranny and the achievements of the Qin Dynasty? No, in fact, the teacher also wants you to develop historical materialism, the concept of time and space, historical evidence, historical interpretation, national feelings of literacy ah)

    ④ Teaching view (teaching should be based on students, play their active construction, the teacher as long as the guidance, hit the line.

     4. Group conclusion

      The teaching process should pay attention to the initiative of students, teachers play a guiding and helping role, emphasize the interaction and cooperation between teachers and students, and advocate "situational teaching" and "cooperative learning".