Slow down a bit. The teacher may have absolutely no clue that the case involves a family with a student currently enrolled in the school since apparently this isn't your daughter's teacher. I certainly don't know all the students in my school. Certainly bring it up to the principal and ask that your husband's case be taken off of the assignment and substituted with a different case, but it is probably completely coincidental on the teacher's part. I suspect the teacher will have no problem substituting a different case.