I knew that would bite me in the b*&( lol. I just threw out 90% to highlight that it's NOT 100%. If I recall correctly from Reforming Gifted Education, it's more like 85% but schools will often insist upon 95%. For subjects like science and social studies, that's crazy but they are so subject specific. I think in the Math talented kids book (blanking on the exact title) they also suggest 85% but I'll have to double check.