Pierre, Duality (units from outside the SI mixed in with SI Units, under the false implication that they are of equal value) is a disaster for mathematics and science education in the USA!
Duality is also objectionable in publications by technical societies which sometimes have a policy of requiring duality, althouth SI appears in first place more frequently in recent years. In particular, Chapter 7 on Electromagnetics in the ASNT series on non-destructive testing in the aerospace industry, uses "duality" in a field (electromagnetics) where SI has already prevailed, almost exclusively, for several decades. How exclusive is SI in STEM Education in the USA? Will an answer to this question be given at the Seminar on STEM coming up later this year? Who from the USMA can participate and press this question? Eugene Mechtly ________________________________________ From: owner-u...@colostate.edu [owner-u...@colostate.edu] on behalf of Pierre Abbat [p...@bezitopo.org] Sent: Friday, April 04, 2014 10:46 AM To: U.S. Metric Association Subject: [USMA:53676] Common Core Math http://www.corestandards.org/Math/Content/MD/ They're still introducing inches and centimeters together and not explaining that the inch is defined in metric, thus leaving students confused about which units to use. Have any of you written to Common Core about this? I was off the list a few months ago because of mail server problems, so I have missed something. Pierre -- li fi'u vu'u fi'u fi'u du li pa
