'new classroom' is a correct and usable phrase in written English.
For example, you might use it in the sentence "The school is constructing a new classroom to accommodate more students."
NEW classroom booking system for SML 207 & 218! Hope you all had a great start of the new semester.
Is there a teacher for the new classroom?
Gordon cited the steady introduction of new classroom technology in Northwestern's lecture halls as an example.
The wall decoration of choice in my new classroom is the unpainted breeze block.
The teacher called us off, and one by one we marched to our new classroom.
They are using Expeditions, a new classroom initiative unveiled by Google in May.
Some districts and schools are also giving teachers the latitude to try new classroom methods.
"The new classroom building solves both problems at once," he said.
The primary school in Mguwata has two brand new classroom blocks and 597 children.
The new classroom should teach the huge array of complex skills that come under the heading of digital literacy.
It built a new classroom complex, where works can be brought for study from storage or from the gallery walls.
