Even the Stanford 9 is only given once a year. But teachers don't teach and kids don't learn in one year increments, much less four year increments. If a third grader does not learn 2-digit multiplication in October, she won't learn long division in December. I promise you. That's where technology comes in.
Schools are the most data-rich organizations in our society.
Just think of the fifty separate academic standards that a Massachusetts 6th grader is expected to meet in a single subject. Multiply that times twelve grades and then multiply that again by six core academic subjects. We're at 3600 standards. Multiply that again by 650 students, the average U.S. school size. Now we're well above two million bits of information at the principal's level.