Not finding the name of the Chicago high school which uses the "not Yet" grading. This article from 2010 mentions the school, not by name. I'm wondering whether the school has continued to utilize that approach now that 5 years have passed... if so, one would anticipate more media coverage. My thought at this point would be to add it to list of questions to ask the author, in a letter, and see what response you might get... possibly even prior to her presentation.