In an atom, the electrons orbit around the nucleus in the same manner as the planets orbit around the sun.
That's been debunked for many many decades but middle scool still teaches this model. At least I wasn't told back then how misleading and wrong that is, only in high school right before graduating the physics teacher emphasized this misconception. I remember how mad she was about it lol. I have no clue how its taught elsewhere.
Yes I agree to all of this, especially to the last sentence lol. I didn't want to give the impression that simplifications are a bad thing. But I think at one point you should start to hint that its a simplification and that there's much more to it, like kurzgesagt does