Teachers who pray the midday prayer as soon as the time enters without waiting for the call to prayer: Is their practice valid?

Question:
He says: Honorable Shaykh, may Allah grant you success. He says: We are teachers, and we pray the midday prayer in congregation in the mosque with some of the students, and that is as soon as the time enters, and we do not wait for the call to prayer, because the mosque adjacent to the school is delayed from the time by a period of five minutes. So is what we do valid?

Answer:
The call to prayer in the town is sufficient if you hear the call to prayer in the town or near you, that is sufficient. And your prayer in the school is a matter of concern, because the mosque is near you and you hear the call. It is obligatory for you to go to the mosque, pray in it, and return to the school, unless there is a preventer or a danger in going to the mosque, then pray in the school. Yes.