Here is the most important principle of doing class :
Let students think by themselves, discuss one another, as much as possible.
Let students take initiative in solving problems.
If a student is used to being passive in his/her learning, he/she becomes unable to take initiative in his/her working. He/she might become good at being instructed by others, but he/she can create nothing by him/herself. Indeed, he/she becomes at a loss when he/she is obliged to solve a problem at his/her discretion.
As to the eduction, teachers must take a long view. They should not ask immediate results from children.
Thus, first of all, teachers must become used to giving sufficient time to students for working, and to waiting until they reach some conclusions.
There are many techniques to let students think/work by themselves.
Try, at the beginning, the followings :
Method A
Divide students into groups, maxmum six students a group. Let groups solve a problem.
Method B
To an answer of a student, let other students react. Circulate their reactions. Your role is just to control their actions.
Method C
So far as space permits, place students' seats in such an arrangement that students feel free to discuss among them.