EDM has been around used increasingly since the first edition in '98, and wasn't created for CC state standards (which the NGA officially organized in 2009). EDM has had to align with CCSS, though, in it's latest edition, and there's some conflict over it; for example, the kids were previously not pushed using EDM to do rote memorization, but now they do math fact fluency. Also, the lack of technology references in the CCSS might conflict with the EDM encouragement of use of calculators. (Note, as a non-educator, my observation compares extended family & friend experiences in elementary arithmetic ten years ago to my kids today.)

Last edited by longcut; 07/13/15 09:21 AM.