The Charleston Post and Courier published my letter on TIMMS-R, especially regarding teacher certification and study of SI units to the exclusion of others. The link is (for a few days) http://www.charleston.net/pub/news/letters/lets1219.htm I posted a copy here earlier and it was printed with very few changes. Jim -- Metric Methods(SM) "Don't be late to metricate!" James R. Frysinger, CAMS http://www.metricmethods.com/ 10 Captiva Row e-mail: [EMAIL PROTECTED] Charleston, SC 29407 phone/FAX: 843.225.6789