Religious instruction in our parishes is not restricted in any manner by the teachers gender. More women than men hold these positions.
As a Dominican, I and the Sisters of many communities were the first instructors of the Faith. The majority of our US priests and bishops as well as laity were taught religion by women in our schools. Today lay women, men as well as religious hold those positions in our parishes.
Since we as women were baptized, we too put on Christ and are equal as receivers of the Faith we profess, and pass it on to others. Paul mentions that Timothy was the faithful Christian he grew to be because of his mother Eunice and grandmother Lois who taught him the Faith. 
Paul sounds like a reliable source who gives testimony for the charism that women have for theological instruction.