Behaviour

In my opinion behaviour it's relative with the teacher's way to explain. Not all the good behaviour of students depends of teachers, and not all of the bad behaviour of students depends of  teachers, but they have relation. (I am not sure what you mean, my dear)

If the teacher who are explaining the lesson isn't charismatic and expresses with monotony , of course, the students will be bored.

But in the opposite way, if the teacher explain the lesson with enthusiasm and simpathy the class will be interesting and productive.

I think that, although the lesson theme it's bored itself, if the way to explain it is the appropiate it's almost truely that the students will be attentive.

Also, there are students that are disruptive for their own personality, but that's not the case of my class.

Òscar Manyoses Carles