When Less is More: The Case for Teaching Less Math in Schools
psychologytoday.com
psychologytoday.com
An interesting post, but quite a leap of inference, isn't it? Start with, a) One school district once successfully started arithmetic instruction in sixth grade. Go on to b) elementary school teachers in two districts in New Jersey are weak on geometry and the principles of arithmetic. Arrive at c) the statement above.
http://www.ams.org/notices/200502/fea-kenschaft.pdf
is a very good read. (This link may be behind a paywall for some readers. It has been posted to HN before.)