It means that students wouldn't be familiarized with the techniques if they haven't been presented earlier to them.

It means that some techniques, which are elaborated to force students to use the foreign language in the classroom, can gradually lose their importance.

It means that some classroom rules are only efficient if they are presented in L1

It means that students are more motivated when they have to follow certain classroom techniques.

It means that students only interact with their peers if English is not something unfamiliar to them.