Mr. Feinman had stumbled on a little-known facet of the test: because of the complex way it is graded, a student scoring extremely high on one part of the exam has a sharp advantage over a student with high but more balanced scores in each subject.
…“As taxpayers and parents, we should know how the test is graded — not necessarily with an eye to changing it — but certainly as a matter of public knowledge,” said Mr. Feinman, who lives on the Upper East Side.