Usually, situations aren’t as they appear on the surface. If half or more of students in a classroom aren’t paying attention, it isn’t necessarily that the teacher is lacking in skill. It is also not necessarily that the kids are naughty. There is probably something else going on.
The more a child associates negative emotions with learning, the more his brain will shut down. He will be immersed completely in his emotions which are urging him to avoid the danger he is in. I have seen children who get to this stage in their life check out, and of course, learning does not happen.
I believe that the most successful learning takes place when an environment is prepared with such careful thought that when a child enters that environment, he automatically begins to absorb concepts without anyone instructing him and without even realizing that he’s learning.