Required language is controlled by students. Mother tongue use is low or absent. This will give students confidence. Within the group, a student is assigned to be the language monitor. Students with different L1 work together.
Teachers have to be persuasive yet strict.
In the late 1960s and early 1970s this was a popular approach. The basic structures of writing were cataloged. They thought that if students were shown models of correct compositions that had patterns, the students could mimic these patterns. After they understood the structure of the essay, they could take any topic and plug it in to this formula. Pros - it provides a structural framework, gives the students clear rules to follow.