I think it's very clear that a woman shouldn't be a pastor, or a preacher. To extend that to women not teaching other women or children, or never teaching men anything even if it's outside the context of preaching or a Bible study, seems a bit of an overreach to me. I prefer that a songleader be male, because I believe men should take leadership roles in public worship, but it's only a strong preference, not something I would be dogmatic about.