junior high school

US /ˌdʒuː.njɚ ˈhaɪ skuːl/
UK /ˌdʒuː.njɚ ˈhaɪ skuːl/
"junior high school" picture
1.

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.
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He met his best friend in junior high school.
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middle schoolintermediate school
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junior schoolhigh schooljuniorsenior high schoolschoolschoolinghigh