Oh gosh! We might have to been in class that full of Chinese people in high school.
2 weeks ago, the principal made a decision that foreign students should study with local students. Removing the overseas department in high school is the action the principal made. The students in the last year of secondary school department are worried about it.
There will be no Overseas Department in the your new semester. You will all be in different classroom. See the notes on the board. No worries.