One thing that I think often gets overlooked when we talk about reasons to switch to standards based grading is this idea of bell curves being the norm (excuse the pun). I think that if teachers actually analyze their grading system it will actually resemble a standards based system more so than a bell curve system.
In the bell curve system students are pitted against eachother, in standards based (or mastery based) the students are pitted against their own understanding.
I don’t know any teachers that grade on a curve outside of universities. A lot of (but not all) teachers give their summative assessments the most weight and it is currently in vogue to let students attempt their summative assessments as many times as necessary (this coming from speaking to teachers within the district and across the Twin Cities in my teaching program).
I know in our standards-based teaching leader focus group last year we discussed this topic in depth, and it seemed like most teachers already did do a majority of the things required to make their classroom ‘standards-based’ (i.e. had specific learning targets, formative/summative assignments).
Overall, I really feel that the things that are happening inside of the classroom (especially in the district) already look very similar to the way they would in a standards-based (or competency/mastery based) system, the key difference being the reporting of the grades.
We already do a lot of project-based work, we already do a lot of online learning which allows students to work at their own pace.
TL;DR I think teachers are actually further ahead on this topic than given credit for, I think it is the “system” that is lagging.