Very interesting posts and discussion.

I like the idea of using standard deviations to differentiate the levels. You then have the 2 SD above the mean is MG, 3SD is HG, 4 is EG, and 5 is PG.

The problem is that those only work in theory as with 3 SD above, you already get to the >99.9%.


Nevertheless, personality and drive can trump/boost the IQ score. That is the part I like about Ruf's levels. However, my problem with Ruf is that her levels seem to work well for the kids that have early academic interests.