The teacher from Mars

Today was my last day of work for quite a while as I am entertaining a steady stream of family and friends from now till September. This combined with our own 6 week holiday leaves little room for work. The kids are usually curious about where this new supply teacher comes from. Some of the better suggestions are: London (most common), Manchester, Ireland, California, Scotland, Sheffield, South Africa, America, France, Spain, South America, Mexico, Brazil, Leeds!, Perth (getting close) and, best of the lot, Mars! I must have been looking very poorly that day....