<p>Thank you, bluebayou. I am becoming clearer.
Many selective colleges have to choose students from a pool of almost perfect scorers . Although test scores are not sole factor of admission, it may be better for everyone if there would be nationwide tests measuring higher level of academic achievement available to all higher achievers. There are many things other than tests that show students’ ability. But it seems to me evaluating those for admission purpose is sometimes too subjective.</p>