One room is one timetwice as larger than as the other. One room is twice as large as the other.

I assume you want to say 一个房间比另一个大一倍？

So the two of you both stay inuse the same (room---the larger one) room---for teaching students. So the two of you both use the same room---the larger one---for teaching students.

My point is that one of you can teach in thealso use the second, smaller room, and a small room really for teaching, because the size of the room doesn't matter as much for teaching. My point is that one of you can also use the second, smaller room for teaching, because the size of the room doesn't matter as much for teaching.

Not sure what you're trying to say here. I took a guess with the correction above ^

The current casetup really affects the quality of your lessons. The current setup really affects the quality of your lessons.

You can take ithis into consideration. You can take this into consideration.