It appears that on one hand you want the Morah to be committed to work a full school year. On the other hand they are hardly paying them anything and there is no incentive to stay.
Let’s face it no Morah no matter how dedicated she is, is not going to turn down a shidduch just so she can finish the school year.
Let’s say there is have a no marrying clause in the Morah’s contract and she finds a boy and gets engaged. The most the Yeshiva can do is fire her and possibly hold back two weeks pay or about $500 – 1,000 gross or $350- $700 net. The Morah has nothing to lose and goes on unemployment and tells them (Dept of Labor) that her employer held back her last check. They will get her, her back pay and the yeshiva will have to hire her back. The Morah is not interested in the job and the Yeshiva will now have to prove that the Morah’s not interested or face fines.
In fact the firing of the Morah maybe in the best interests of the Morah. This way she collects unemployment while planning her wedding . It also doesn’t solve the problem as the yeshiva needs to find a replacement anyway. All it does is increase the unemployment premiums that they have to pay.
A better solution is for the yeshiva to promise at least subsidized housing if she finishes the year. This together with help in finding a kollel for the groom will help the yeshiva retain qualified teachers.