The teacher seems to consider that a matter of course.

It does not appear to interest or please him at all.

Nothing arouses him but when they do wrong, and that only excites him to anger and frowns.

Now in such a case there can, of course, be no stimulus to effort on the part of the pupils but the cold and heartless stimulus of fear.
Now it is wrong for the teacher to expect that things will go right in his school as a matter of course.

All that he can expect _as a matter of course_ is, that things should go on as well as they do ordinarily in schools--the ordinary amount of idleness, the ordinary amount of misconduct.