emphasis mine.
Despite the not-so-accurate characterization in this thread's title, I believe your mom's observation to be true based on our kids' experiences this Spring. Few, if any, of their classmates even bothered to check in. One teacher was almost in tears that our child was literally the only one who logged in for her office hours. Luckily, our kiddo took advantage and literally got private Algebra II lessons to set her up for this Fall.
But I blame our District for much of the failings: teachers were instructed not to cover any new material and that any other "recovery" work was strictly optional.
That does really affect a teacher. My oldest daughter had been always pressed by us to maximize her knowledge as diversely as possible. She has a very, very rare mental gift - not super IQ - but something else of little value is not fine tuned and developed - so we forced it always. We PUSH, REQUIRE each of our children to excel at what is each one's abilities and interest. For example, another one is in the slow-learn category. School is VERY hard. But as a young teen probably could build a house from the ground up with absolute perfect fine detailing. And loves doing it. So... to learn how to be the best of the best. Amazingly skilled. Forced to become so too. To bring in craftsmen to teach him even. Have him go on their jobs - cheap but paid. (All our children have to EARN their money. NO FREE MONEY.)
To interact with the teacher, to not just be there, not just get an A, but to learn from the teacher. Master all the teacher's skills and knowledge - and then go beyond the teacher. This could quickly evolve to a teacher-student relationship were a tad they both were teaching each other. Even listen close enough to spot misspeaks and inaccuracies, get it right, show to be listening Talk about teacher's pet! It was more than just a fantastic student, but incredible success. Not only did they write letters of recommendation, they made calls to the universities. One even went to talk to the dean of the department.
Not the top grade student - a mere 3.85 as opposed to one of those 4.65 adjusted types. But a KILLER resume' of actually success. 3 Science Fair wins - 2 in one year and it published in International Science Journals for a unique protocol study that changed water testing worldwide. Got the school (starting at 10th grade) getting corporate grants. WOW! Captain of winning science bowl team and on and on. We told all her teachers to "push her hard. We'll do our part." She hated it as an adolescent - but came to love all the POWER winning and successes bring, all the POWER mastering diverse knowledge including experience knowledge, mastering inter personnel relations with teachers etc brought her. In her last year of high school they even had HER teaching a class of sophomores - not just the subject, but HOW TO BE A STUDENT and WHY KNOWLEDGE IS POWER - the ONE THING no one can ever take from you. (Sorry, I brag on my kids A LOT!)
When she understand the situation was as an adolescent - telling us the teacher was making her redo a paper for the 5th TIME!!! No one else had to. It was like "I have to be perfect or something." Answer: "Yes, we told your teaches to do that. You paper isn't done until it's perfect. However many times that takes - and you have to work with the teacher to figure it out. Image a high school kid trained for year to write a paper with perfect grammar, punctuation, structure, word choice... all things us as parents could never do. We could only support the teacher. Probably around 10th grade she figured out she had greater knowledge and academic skills than us - but not life experience skills we each uniquely have - both being INTENSELY competitive people. Life is a competition. Fairness is irrelevant.
It really has to suck for a teacher when all the students act like they hate being there, have no interest and see the teacher more an annoying cop for which their challenge is to see what they can get away with - and get away with not doing. Parents that don't give a damn, other than the few who come on parent-teacher night - most to make lame ass excuses or bitch at the teacher. I would think it is only a matter of so many years stuck in a school with students like that before the teacher no longer gave a damn. Just go to work, endure doing the job, go home.