On 2012-03-01 07:51, Mars brown wrote: > what ages or math levels are you teaching? > arround 12 to 17 -- URL: http://blog.u2m.nl/ GPG-Key: 4096R/FCF154AE 2008-10-19 [expires: 2012-10-18] Key fingerprint: 0506 976E 2346 53B4 A628 EC33 E23D 16EE FCF1 54AE Key URL: https://u2m.nl/data/FCF154AE.asc