You do realize that the only reason BMG can enforce the freezer clause is because the guys are getting ready and going on dates during the time he would be normally be learning in yeshiva. The Morah is dating on her own time. Even if the Morah’s contract had a no marring clause, it would be unenforceable both in secular and Jewish court. Most of these girls don’t have any assets nor are they being paid great salaries so you can’t fine them and as far as using the school as a reference, I doubt she will use them.
You also realize that the pay is only $1-2 thousand a month for 10 months. If you want the Morah to wait until after the school yearto get married you will need to bribe them . For example offer to pay for the wedding if she gets married after the school year. ( A small wedding can cost over $10,000 and up , which is almost the annual Morah’s salary) Another alternative, is to have a spare apartment which the newlyweds can live in for free until the end of the school year.
Even if the Morah signed the contract, if she gets engaged she should tell her employer. If they fire her and hold back pay she can sue them in civil court and/or go to Dept of Labor and get unemployment assuming she worked more than three months on the books. The Dept. of Labor will get her any back pay held by an employer. If she goes to a Jewish court the yeshiva may be forced to pay her for lost wages for the period of time from the date fired until the wedding and any back pay they withheld.