Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

A head teacher , headmaster , headmistress , head , chancellor , principal or school director ( sometimes another title is used ) is the staff member of a school with the greatest responsibility for the management of the school .
A head teacher ( also called a school principal , or headmaster / headmistress ) is the teacher in charge of a school .