Female students uncovering their hair in the presence of a male teacher

Q 1: Is it permissible for female students to uncover their hair in the presence of elderly or married teachers?

A: It is impermissible for a woman to uncover her head or face in the presence of Ajanib (men other than a husband or permanently unmarriageable male relatives), including those mentioned in the question. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.