Come into the classroom, please.
This game is too difficult. I never have enough time to get to room number 1569 in this stage no matter how hard I try.
I was sleeping in the school infirmary.
You'll see this attached to other words... like "waiting" or "guest." When you see this, you'll know it is a ___ room, making this word mean room (same as the kanji).
The reading is the on'yomi reading. Don't type the 〜 out when writing the answer. It's just there to let you know that there's usually something attached to this word.