Dozenals: information about Base Twelve (counting by twelves instead of by tens) and articles showing dozenals in use. See the DSGB site DSGB.Much of the material published there is culled from DSGB leaflets, archives and publications. You will find links to other sites interested in dozenals and/or other number bases.
Weights and Measures: historical, traditional Imperial, Metric and other proposed systems; not just length and weight, but time units, temperature scales, calendar, anti-metric rumblings and whatever. There are links here to other interested parties.
Please read the Daily Telegraph article about the prosecution of a trader for using Imperial weights. TelegraphNumbers and includes articles on prime numbers and related topics in mathematics. Not everyone's cup of tea, but you might find something interesting to download and peruse during your coffee break.
I've added the school I went to - Haberdashers.
