Shaykh Muhammad Ibn Haadee al-Madkhalee on Teaching Women Without Separation.
The noble Scholar is asked about a man teaching women about the Religion without any covering veil between them, such that he is looking at the women and they are looking at him. The Shaykh answers with the warning of the Prophet Muhammad (sallallaahu 'alayhi wa sallam) against the fitnah of women. Then he goes into the famous poetry of Rabee'ah Ibn 'Aamir, commonly known as "Miskeen ad-Daarimee" about the woman in the black khimaar (head covering) who seduced the devout worshipper with a single glance!