Classroom
noun
The teaching room is just a classroom.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
教室にいる
to be in the classroom
教室に行く
to go to the classroom
教室に入る
to enter the classroom
教室をする
to teach a class, to run a classroom
教室を出る
to leave the classroom
教室をオープンする
to open a private school, to hold a class
ヨガ教室
yoga studio, yoga class
パソコン教室
computer classroom
ピアノ教室
piano school, piano lessons
ここは、一年生の教室ですよ。
This is a classroom for first-graders.
代わりの先生が中々教室に来ません。
A substitute teacher still hasn't come to the classroom.
今日は、マフィンを作るための教室に行きます。
Today, I'm going to the class to make muffins.