средняя школа bedeutet auf Englisch

high school [high schools]▼noun
[UK: haɪ skuːl] [US: ˈhaɪ ˈskuːl]

middle school [middle schools]▼(school containing both primary and secondary students)
noun
[UK: ˈmɪd.l̩ skuːl] [US: ˈmɪd.l̩ ˈskuːl]

secondary school▼noun
[UK: ˈsek.ən.dri skuːl] [US: ˈsek.ən.ˌde.ri ˈskuːl]