I wonder if this system might ameliorate that negative correlation, if junior teachers are assigned the worst students (not schools). I would think the enthusia

I wonder if this system might ameliorate that negative correlation, if junior teachers are assigned the worst students (not schools). I would think the enthusiasm and engagement dissipate after years of fruitless struggling with bad pupils. If you give the low achieving students exclusively to the young teachers, their wide-eyed passion for the youth of tomorrow or whatever can carry them through the first few years - offering the best to students who won't be able to make much with it (and offering the best to the late bloomers who were miscategorized who will). From there they slowly matriculate up the ranks, teaching students who are more and more capable of and receptive to learning. I bet their enthusiasm weathers the years better overall as they always have the next step of better students to look forward to, and their job becomes easier in a sense as time goes on.