The GDC in Colorado is one of the few places where the SB-LM is still in use. It is an outdated test and its continued use is not withouth controversies. I remember reading a lot about the advantages of it when we tested for the first time a few years ago.

I think achievement testing (regardless of the application) is a nice complement to the IQ test. It is also something that schools might understand better than the IQ scores, particularly people who still have the sense of the older tests with the higher ceilings.

The most widely used AT are the WJ-III and the WIAT (I think they are in version III now?).

My dd loved doing AT.