It is virtually impossible qualify and measure thinking because creativity and criticism both expand upon and subjugate collectively held criterion. (In other words, thinking is like a moving target: you can’t pin it down long enough to assign it a grade.)
This single post sums up what in my opinion is the root problem with our entire pre-collegiate educational system (and most colleges as well). The very best teachers and institutions are the ones that teach you how to think — and these are rare.