I often find that teachers in general give special attention to:
(a) A child who misbehaves (both as a result of attention deficit or plain mischief)
(b) A child who is either more advanced or significantly less advanced than the average in the classroom. Those advanced are often offered the opportunity to develop their talent further, while those struggling are given the help to catch up.
The average, well behaved straight A student is not looked at. Sure, the teacher notices you. Sure, the teacher will give a raving report at the PTA. But you don’t get any attention.
And kids need attention. Warmth is a vital part of a childs maturing, and being noticed is the first step to any of that.
It makes a difference later in life as well. When you enter the Real World, and suddenly have personal/spiritual problems, you haven noone to turn to. There is no-one you can trust, who knows you and you know them, who is equipped. If every child was given the ability to develop a relationship with mentors during the period in school/seminary/yeshiva, they would have someone sound to approach.