Sure, but having read a large chunk of educational literature I'm not aware of any alternatives with fewer distortions from parental aid. Grades correlate more highly with a good home life than test scores do, for example.

As long as we have "prestige" universities there's going to be some form of skills testing, and no one has ever designed an un-gameable test that can be administered nationally. The question we have to ask ourselves then is how we can reduce game-ability and I doubt we can make improvements that are more than incremental.