How I can reduce the noise between two rooms share a door and window?

I have a room that shares a door and window to another room class. I can hear everything that happens in the classroom next door and she can be with my class too. My room was destined to be a model office no a classroom, but here we are. Is there anything I can do to reduce noise between the rooms?

If you do not need the door and window … is board covered with rigid foam insulation typically 3 / 4 to 2 "think and blue. Bought in many home shops.

How to Paint Door and Window Trim – Home 101

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