初中 (chū zhōng): โรงเรียนมัธยมต้น (ตัวย่อของ 初級中學|初级中学[chu1 ji2 zhong1 xue2])

My younger brother is studying at junior high school.

She graduated from junior high school.

Junior high school students have a lot of homework every day.

I started learning English in junior high school.

He liked sports a lot during junior high school.

My younger brother starts junior high this year.

This junior high school has many students.

After graduating from junior high, he was admitted to senior high.