What? You think our teachers are overpaid compared to, say, Mexico or Korea?

[JVS]

25. About number 3 and 4

I don't have trouble believing this, as schools in the US seem to be treated as daycare facilities rather than schools. There are places where lessons are finished by mid-day. May Americans depend on the school to supervise their kids from before 8:00 AM to 3:00 PM or later (extracurriculars are a handy way to keep that kid inside for a full shift). As a result we rack up a lot of hours here even with a short school year.

Instead of conversion into a single currency, I suggest using purchasing power parity indexed comparisons. Or you could indicate where a teacher would be in the income percentiles of their country are given (telling us where teachers place within each country) but that runs the risk of confusing people by adding another statistical concept.