Physical Description of the room

The classroom is very colorful. There are four tables with chairs in the middle of the class. Play areas are in the corners. Also they have a TV  in the circletime area.
Atmosphere of the centre
When I arrived in the classroom, the teachers were very busy at that moment. But they welcomed me. It was neither noisy nor quiet. The children were pretty calm.

Hello Seino,

We use the preposition 'in' with corners of a room or picture. If you are going to use 'neither', then the second part should use 'nor'. (The alternative is either/or.)

Hope this helps

Bob

Physical Description of room

The classroom is very colorful. There are four tables with chairs in the middle of the class. Play areas are at the cornners.  They also have a TV at the circletime area.
-Atomosphere of the centre
When I arrived at the classroom, teachers were very busy. However, they welcomed me. It was neither noisy or quiet. Children were pretty calm.