Yes, sleeveless shirts should be acceptable. Children aren't going to not learn math because their lady teacher is in a sleeveless god damn blouse.

Teachers should be allowed to do whatever they want in their spare time as long as it does not involve breaking the law or questionable activity with younger children. Porn is probably a no-go, too. Honestly, though, smurf off if you think people should be punished at their jobs for their level of attractiveness. This is equally as bad as saying, "Are ugly teachers too ugly to teach because kids won't pay attention to them?" If they're qualified for the job, they're qualified for the job.

is this really where we're at with education, dissecting the spare time of people who willingly step into classrooms to teach the roves of brats we're putting out into the world