If I'm reading the linked page correctly, these metrics were verified by correlating them with individual student improvement on a variety of standardized tests

If I'm reading the linked page correctly, these metrics were verified by correlating them with individual student improvement on a variety of standardized tests and "more cognitively challenging assignments in math and english". This is better than pure circular logic, but until those metrics are validated, these are suspect. In particular, everything seems to test for shallow understanding.