If changing from one kind of job to something different is as difficult to get a chance to do in the UK, where I presume you live, as in Denmark, she has very little chance of suceeding at the age of 31.
A publishing house specialising in school books might just want her, but it would doubtless be easier for her to get a job teaching adults.
Was it trying to keep dicipline in the classroom that got her down? If so, teaching adults is usually much easier than teaching schoolchildren.
Museums or other cultural organisations as already suggested might be a possiblitiy, but they are probably overflowing with historians already.
Your daughter needs to sit down and think long and hard about what she wants to do for the rest of her working life, which after all is something in the region of forty years, as her generation will probably be forced to work until they are 75 or so.
If she has neither husband nor children or any intention of trying to have a family, going back to Dubai, where she was probably making a very good salary for the next five to ten years and banking as much money as she can is probably her best bet. That way she should be able to retire early and live off her savings.
Another possiblity is advertising either in the rich Arab oil countries or in Switzerland for a position as a nanny or governess (private teacher). There are still a certain amount of rich families where the parents travel so much for work that they need a person they can trust, and whom they pay a good salary looking after their children round the clock.
Apart from her teaching qualifications, she will need to be able not only to drive, but to drive to the standard of a security trained chauffeur and have good skills in self-defence. A working knowledge of French and German, Italian or Spanish (at least two languages over and above English) would be a selling point too.