"In math, reading and problem-solving using technology — all skills considered critical for global competitiveness and economic strength — American adults scored below the international average on a global test, according to results released Tuesday.
Adults in Japan, Canada, Australia, Finland and multiple other countries scored significantly higher than the United States in all three areas on the test."
...And what do adults in Japan, Canada, Australia and Finland have in common? Class? Yes, they have ethnically homogenous populations. Coincidence? You make the call.