MOE Hater:Maybe some one here with a bit of experience can help us estimate the mean and standard deviation for all 4 subjects. I think it would then be more simple for people to calculate the estimated T-Score That is a very good suggestion. Because taking a single multiplier (like 0.712 or whatever other number) across all the 4 subjects will likely lead to errors.Experienced tutors and parents can certainly provide some idea of mean and SD for each subject. It will not only make it easier but more accurate and fair.Thanks to all.