Three of the victims were in serious condition following the attack outside a school in Turgutlu near the western city of Izmir.
"The treatment of 10 minors is ongoing, including three of whom are in intensive care," Interior Minister Mustafa Ciftci told a news conference in the nearby town of Manisa, saying one victim had been discharged.
Although shootings are rare in Turkey, it comes five months after two back-to-back attacks by teenagers on consecutive days in April that shocked the nation and sparked public concerns about security in Turkish schools.
