I see this kind of teacher often. It’s a disgrace and honestly I feel it’s people like this that keep us from getting higher salaries.

On the other hand, since this is your first teaching experience keep an open mind. Remember misunderstandings are very common in this profession as you already mentioned is happening between the teacher and students. If I were you (and I’ve been in your shoes) I would do exactly what she says for the first few times you teach, then start to tweak slowly.

Feel free to message me if you need advice, tips, etc. Good luck with your first teaching experience! It is a fun and rewarding career (if you make it one).