Well, then your spouse dosen't know how to account for their time very well.
When I was teaching, I topped out at $52k a year. This was in the midwest, and the top-paid teacher in the district I think made near $60k.
We were required to be in the classroom for 990 hours. IF you just count that, 52,000 / 990 = $52/hr.
But I was required to be in school more than just the kids. This averaged to be 1 hour before they arrived, and 3 after. (4hrs*5days*39weeks) = 780 + 990 = 1770 hours required to be in school. Now, the per-hour figure goes down to just under $30/hr.
Oh, and if I don't get my grading, lesson plans, meetings, and everything else done in those four hours (I rarely did), then I had to do that as well. Lets be really conservative and say that was only 6 hours a week. 6*39 = 2,004 hours. $25/hr.
Oddly enough, ~2000 hours is what an average blue-collar worker gets paid for per year, including vacations. $52k is pretty good, but I was also at top-pay. That is what was worked-up to.