> Soldier quality is more difficult to assess
School administrations try (and fail) to determine "teacher quality" by looking at standardized test scores.
Quality of teaching is easy to assess however: you just have a few experienced teachers pop in and observe a class or two, and it's obvious to them if the teacher is good or not.
> Also, 14% isn't bad given that many teachers have 2 months off.
It's not 2 months off, it's 2 months unemployed.
When they hire you as a teacher, they ask you ahead of time if you want them to reduce your paycheck amount so that you can receive checks during those 2 months.