Comment by bsder

> it consistently amazes me that few systems, teaching included, regularly poll their end users (students or employees)

That completely ignores the social and political aspects.

You need to understand that the people who have the authority to do so do not want to document bad teachers, ever. Documenting bad teachers makes political waves and principals and superintendents never want to make waves because that impedes their ability to both do their job as well as get their next job.

Even if a teacher is very bad, they may be well-liked or be an important part of the community. If you attempt to remove that teacher, they may rally support from the community that can be extremely noisy and inconvenient.