junior high school
US /ˌdʒuː.njɚ ˈhaɪ skuːl/
UK /ˌdʒuː.njɚ ˈhaɪ skuːl/

1.
中学校, 中等学校
a school for children aged 11 to 14, typically comprising grades 7, 8, and 9, between elementary school and high school
:
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My daughter is starting junior high school next year.
私の娘は来年中学校に入学します。
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He met his best friend in junior high school.
彼は中学校で親友に出会った。