One of the best teachers I ever worked. With was sbout 5ft2 and very quiet!
Yes, I agree with that. I knew a 60+ year old history teacher who knew nothing but teaching history and "refused" to retire.
She was tiny and softly spoken. Never ever raised her voice nor got anywhere near being angry. But she had that special attribute of having a "presence" - she just gave out a confident vibe. She was confident in herself, confident in her subject - confident in her teaching. Basically she displayed no sign of any weakness, so the pupils didn't have anything to goad her with.
The very first time she got a new class/form, she told them explicitly what she required from them, repercussions for bad behaviour, not doing homework, etc., and then she stuck to it, no excuses, no inconsistency, no second/third warnings. She never made empty threats. But more importantly, she never showed anyone up or made a big deal of punishments in the class itself - her stock answer to everything was a quiet "see me after class" where she'd say the punishment etc, so she didn't make a big deal out of it and gave nothing for the attention seekers to draw even more attention to themselves!
The pupils knew exactly where they stood. In return, she was probably the kindest, most compassionate teacher I've ever met. Part of her after class "punishment" chat was a kind of "heart to heart" with the pupil, not just punishing for no homework, but asking why it hadn't been done and properly listening for the reason to show a genuine interest and try to offer help/support/advice for future. Same with bad behaviour in lesson, she'd ask why x did that or said that. Often there'd be good reasons for the kids playing up which could be managed better.
By starting as she meant to go on, occasional bad behaviour could be nipped in the bud before it escalated to crowd control problems. She really had "discipline" nailed.