The WI online Hunter Safety courses work like this: Your wife would go through a series of lessons online and take quizes to verify she knows the material. Then, you'll need to find a field day nearby where she'll take the written quiz and the field quiz in person. My guess is you're having trouble locating a field day, correct? I just looked on the DNR website and no field days popped up. Hunter Safety classes are few and far between this time of year with hunting season coming to an end. There are a few classroom classes in the upcoming months, but they're not always conveniently located or scheduled.
If your intent is to get her in the woods and hunting this year yet, you still can. Check out the Mentored Hunting program at
http://dnr.wi.gov/education/outdoorskills/mentor.html