Songs were sung and Bible studies conducted, with men and women participating in reading and in commenting. However, the prayers were offered by men, and the Lord's table was presided over by men. Contributions were made by everybody. In these small churches, no one argued that women should not read or comment in these public services. However, in large churches such practices are judged wrong.
Tradition is the only answer.
But we will not let her team-teach with her husband, like Priscilla did. However, no one ever objects. In the first place, calling a class a private meeting in any church does not make it a private meeting. The Bible makes no such distinction. I would define a private class as one which specifies who can attend and which excludes all others.