"Or talk about rates of progress, such as a gifted student could progress through regular material at a rate of 1.5 years per year of school, a highly gifted (above 145) one may progress 2 years each year, and a profoundly gifted student (above 160) could progress 3 or 4 years per year... given the opportunity."
Zen Scanner - where did you find this info? This is something concrete that I think our principal could really understand.
It's an aggregate from a bunch of different sources. Including a local HG program that asks the question "Is your child excelling at least a year and a half to four years in just one school year." Anecdotally for PG numbers from the ages when some kids attend college, grade skipping and placement reported here, etc.
Here's a specific research source I recall reading before, which stubs in the frontend measure at 1.6 years growth per year.
http://www.supradotati.ro/resurse/ResearchProvisions.htmRereading it now as it may have other pieces.
