from the hooray-we-are-slightly-less-dumb-than-we-thought dept.
DavidHumus writes "The much-publicized international rankings of student test scores — PISA — rank the U.S. lower than it ought to be for two reasons: a sampling bias that includes a higher proportion of lower socio-economic classes from the U.S. than are in the general population and a higher proportion of of U.S. students than non-U.S. who are in the lower socio-economic classes. If one were to rank comparable classes between the U.S. and the rest of the world, U.S. scores would rise to 4th from 14th in reading (PDF) and to 10th from 25th in math."
Thus mathematics may be defined as the subject in which we never know
what we are talking about, nor whether what we are saying is true.
-- Bertrand Russell