The analysis in the first link you posted has flaws as well. The author does not deny that when you break down the US scores by ethnicity, Asian-Americans do as well as other Asians, European-Americans as other Europeans, etc. He bases a large part of his argument on the contention that the US should actually be doing better than it is right now - that "we can do more" - simply because we have a higher GDP per capita.
One example he cites is that the mean PISA score for Asian-Americans is 534, while the mean PISA score for Japan, South Korea, Singapore, and Hong Kong is 533. The author argues that since our GPP per capita is much higher than Japan / South Korea (and especially the Asian-American GDP per capita, which is probably slightly higher than the overall US number, given that Asian-American median income is about $1-2k higher than White median income), we should be doing better than we are now. This ignores, of course, that even this alleged observable underperformance must then be shared by Singapore and Hong Kong as well, which have higher GDP per capita (adjusted for purchasing power) than even the US (Singpore has $10k higher GDP per capita, in fact), but do only equally as well as US Asian-Americans / Japan / South Korea.
The author also argues that it the explosive growth of private tuition services are propping up US test scores, completely oblivious to the fact that the pervasiveness and ubiquity of private tuition services in many Asian countries (especially South Korea) make US private tuition services look like day care centers.
Finally, link-dumping 3 articles and a book that we'd have to purchase on Amazon really does not add much.
One example he cites is that the mean PISA score for Asian-Americans is 534, while the mean PISA score for Japan, South Korea, Singapore, and Hong Kong is 533. The author argues that since our GPP per capita is much higher than Japan / South Korea (and especially the Asian-American GDP per capita, which is probably slightly higher than the overall US number, given that Asian-American median income is about $1-2k higher than White median income), we should be doing better than we are now. This ignores, of course, that even this alleged observable underperformance must then be shared by Singapore and Hong Kong as well, which have higher GDP per capita (adjusted for purchasing power) than even the US (Singpore has $10k higher GDP per capita, in fact), but do only equally as well as US Asian-Americans / Japan / South Korea.
The author also argues that it the explosive growth of private tuition services are propping up US test scores, completely oblivious to the fact that the pervasiveness and ubiquity of private tuition services in many Asian countries (especially South Korea) make US private tuition services look like day care centers.
Finally, link-dumping 3 articles and a book that we'd have to purchase on Amazon really does not add much.