In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Question: Is it forbidden for a female students to free mix with males in the schools, colleges etc
Answer: The reason behind the prohibition against free mixing between men and women is due to fear of falling into fitnah, lest it becomes a means to committing lewd acts; (a means) to violating the honour of women and corrupting the society. And indeed these affairs can become a greater reality through free mixing in education. Therefore, it (free mixing in education) is forbidden. [Fataawaa Al-Lajnah Ad-Daa’imah 12/169]