At least 21 teachers who were earlier dismissed from their jobs were detained as part of an investigation into the Gülen movement, on Tuesday.
Detention warrants were issued for 36 teaches while police have yet to locate the remaining 15.
The suspects are accused of having used ByLock mobile application.
Turkish authorities believe ByLock is a communication tool between members of the Gülen movement.
Tens of thousands of civil servants, police officers and businessmen have either been dismissed or arrested for using ByLock since a failed coup attempt last July.
The detainees were reportedly dismissed from profession with recent decrees issued by Turkish government in the aftermath of the coup attempt.