That’s very nice, but these “ministers” are not ordained clergy; they’re merely elementary school teachers. To be a teacher in an LCMS school, one must receive requisite theological training and be “called” by the congregation supporting the school. The ministry of an LCMS teacher is limited to his or her duties as a teacher, much as, say, the duties of an extraordinary minister in the Catholic Church is limited to assisting in distribution of the communion host.
If that is the case, it would be questionable as to whether she would qualify as a minister or clergy under the federal tax law. The law requires that the person be able to perform “substantially all” of the duties of the ordained clergy. The test case was a Jewish Cantor who won the case that he was a rabbi under fed. tax law. The key is in one’s ability to deliver sacraments.
I don't agree with all the various church rules, but respect their right to have them as long as they do not harm others. I have worked with most of the major denominations and quite a few of the independent and even a few fringe groups. You can't imagine some of the legalistic rules that exist. Some Christian groups resemble the Islamic groups in their suppression of women.
I am wondering about the use of the term “minister” here. I had an old pastor leave the WELS and coloqui with the LC-MS because he disagreed with the WELS position on who was a minister. I don’t think, strictly speaking, her position in the LC-MS is a ministerial one, although, in the WELS they would consider it to be.