A:
It is Haram (prohibited) for male and female students and teachers to mix in co-education institutions, because of the Fitnah (temptation) and provocation of desires and resulting immoral conduct. The gravity of the sin is aggravated if female teachers and students uncover any of their `Awrah (parts of the body that must be covered in public) or wear see-through or tight clothing, or if the students or teachers flirt or joke together, which may lead to transgression of limits and violation of honor.