The United Kingdom Metric Association    http://www.ukma.org.uk

DTI website — about weights and measures and use of metric    http://www.dti.gov.uk/ccp/topics1/weights_measurers.htm

UK Metrication    http://www.dti.gov.uk/ccp/topics1/metric.htm

The National Weights and Measures Laboratory    http://www.nwml.gov.uk

Metrication Matters — What is metrication and why does it matter?    http://www.metricationmatters.com

International Standard Paper Sizes    http://www.cl.cam.ac.uk/~mgk25/iso-paper.html or http://www.learningplace.info/iso-paper.html

Modern metric system — Modern weights and measures, a complete reference    http://www.metre.info

Metrication — lots of helpful info and converters (be warned that the site plays music when loaded, do not access if the music will cause a problem, e.g. at work)    http://www.metrication.com

Metric to Metric conversions (short quiz)    http://chemistry.about.com/library/weekly/aa021903a.htm?terms=metric

Interactive animation showing how big very small things are    http://www.cellsalive.com/howbig.htm

United States Metric Association    http://www.metric.org

US National Institute for Standards and Technology — about units and constants    http://physics.nist.gov/cuu

Metric System Measurements for Non-Metric Users    http://desktoppub.about.com/cs/intermediate/a/basicmetric.htm

Metric Road Signs Seen in the USA
http://lamar.colostate.edu/~hillger/signs.htm

Learn the Metric System on Line with Mr. Light Bulb — for younger Internet users http://king.prps.k12.ca.us/prhs/pasohigh/classes/Fairbank/public.www/homepage/chemist/metric/Metrhome.htm

International Bureau of Weights and Measures (BIPM)   http://www.bipm.fr

One Metre — Canadian metric site    http://members.shaw.ca/gw.peterson/metric.html

Canadian Metric Association — not an official site, but gives contact details    http://niagara.cioc.ca/details.asp?RSN=5108&Number=0

Metric prefixes    http://www.geocities.com/Athens/Thebes/5118/metric.htm

Other Think Metric sites    http://www.think-metric.com    http://www.thinkmetric.com

Dictionary of units    http://www.ex.ac.uk/cimt/dictunit/dictunit.htm

Dictionary of Units of Measurement    http://www.unc.edu/~rowlett/units

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