David and Goliath: Underdogs, Misfits, and the Art of Battling Giants

So what should we be doing? We should
be firing bad teachers. Or coaching them
in order to improve their performance.
Or paying the best teachers more in
exchange for taking more students. Or
raising the profile of the teaching
profession to try to attract more of the
special kind of person who can excel in
the classroom. The last thing we should
do in response to the problem of there
being too many poor teachers and not
enough good teachers, though, is go out
and hire more teachers. Yet that is
precisely what many industrialized
countries have done in recent years, as
they have become obsessed with
lowering class size. It is also worth