What kind of microphone setup is ideal for this situation?

I work with a company that films educational courses for online curriculum. Basically we have filming studios where a teacher/professor will be filmed giving a lecture.

Right now we are using a clip on microphone, but this poses problems as its not always easy to attach, it gets bumped during lectures, and whenever the user looks down at notes they talk directly into it and it gets louder.

I’m looking for a microphone solution that will be stationary, but still functional. It can’t be in the shot so it either has to be on some sort of table stand, or hanging. I also want to take into account that the teachers sometimes move around, so maybe dual microphones on either side of the filmer to make sure the volume doesn’t change too much?

If you have a link of your suggested product that would be great!