well consider the following Hadith, in Al-Bukhari:
Narrated 'Is-haq:
Anas bin Malik said, "My grandmother Mulaika invited Allah's Messenger (pbuh) for a meal which she herself had prepared. He ate from it and said, 'Get up! I will lead you in the prayer.' " Anas added, "I took my Hasir, washed it with water as it had become dark because of long use and Allah's Messenger (pbuh) stood on it. The orphan (Damira or Ruh) and I aligned behind him and the old lady (Mulaika) stood behind us. Allah's Messenger (pbuh) led us in the prayer and offered two rak`at and then left."
If the Prophet can lead the women of a household in prayer, it would seems that having male teachers teach girls or women is certainly possible.
