This is one issue that I'm passionate about. Research increasingly implies that homework is probably harmful in elementary; of dubious value in early middle school; and only valuable in high school and beyond.
> and objective performance assessments
I think some of these radical experiments are crazy. But, there's valid reasons to consider e.g. not grading missing absent assignments as a zero. A few of them:
A) If our goal is for grades to reflect demonstrated student mastery --- a missing assignment doesn't indicate that proportion of mastery "missing." Especially if it has been demonstrated satisfactorily on an exam or by other measures.
B) A couple zeroes on a gradebook can be an insurmountable hill to climb-- leaving no further grade incentive at all for students to work hard in the class.
C) Grades are strong motivation for already-strong students with the most involved parents, but can actually be demotivating for the bulk of your class. An effective teacher needs to find other ways to motivate students. For many students, grades are something that can make one feel bad about oneself but not provide an opportunity for positive differentiation.
The classes I teach are "easy A's" in the gradebook for most of my students... and are incredibly demanding compared to normal MS/HS fare. This requires buy-in from my students. I work to build genuine curiosity and in-class competition (on a variety of axes where all students can excel, not just the top couple dunking on everyone else).
B) yes, happened to me in higher education, fucked an Electrical Engineering work assigment, got a crushing 0, dropped the whole thing, focused on Maths and CS, changed school, and became a programmer. Gave me a kick to never fail an assignment ever again, so not sure what to do if the 0s are so many the kid just doesnt care anymore.
C) The teacher doesnt need to change how to measure I think, he needs to change how they deliver: if they cant reach the level, either they must move out because they never will and that s fine, or they must be handled specially so they reach at a different speed with a different method. I ve seen first hand you can teach hard math fast and burn most or slow and get most super motivated. Grades and exams being the same.