What you say in charge of the school?

That depends on the context! "In charge of the school" is a very broad statement. Here are a few possible responses, depending on who's asking and what the situation is:

* If asked by a student: "I'm a [my title/role], so I'm responsible for [my responsibilities]. If you have a question or need help, I can direct you to the person who can best assist you."

* If asked by a parent: "I'm [my title/role] and I work to support the school's overall success by [briefly explain key responsibilities]."

* If asked by a superior/administrator: "I oversee [specific areas of responsibility]. Currently, my focus is on [current priority]."

* If asked informally by a colleague: "I'm responsible for [my area of responsibility]."

* If the question implies a decision-making role: "Ultimately, the principal/headmaster/superintendent is in charge of the school, but I have significant responsibilities in [area]."

The best answer will be concise, accurate, and appropriate for the audience.