In case you didn't know, Kean is one
of the next big things to come
out of Italian football, the player has been absolutely destroying the Primavera for the better part
of two years and was finally given regular first team call ups this year, albeit these call ups were mainly for
depth purposes and the player
rarely appeared on the field.
Accordingly, and also per the research, this is not getting much better in that, as per the authors
of this article as well as many other scholars, (1) «the variance in value - added scores that can be attributed to teacher performance
rarely exceeds 10 percent; (2) in many ways «gross» measurement errors that in many ways come, first, from the tests being used to calculate value - added; (3) the restricted ranges in teacher effectiveness scores also given these test scores and their limited stretch, and
depth, and instructional insensitivity — this was also at the heart
of a recent post whereas in what demonstrated that «the entire range from the 15th percentile
of effectiveness to the 85th percentile
of [teacher] effectiveness [using the EVAAS] cover [ed] approximately 3.5 raw score points [given the tests used to measure value - added];» (4) context or student, family, school, and community background effects that simply can not be controlled for, or factored
out; (5) especially at the classroom / teacher level when students are not randomly assigned to classrooms (and teachers assigned to teach those classrooms)... although this will likely never happen for the sake
of improving the sophistication and rigor
of the value - added model over students» «best interests.»