50% of success is just showing up!
Seriously, though, maybe there’s something to it; if a kid shows up every day, is polite and supportive/not disruptive, participates in all in-class discussions and activities and shows potential, then maybe that’s half of it… The other half is the work, and you average the two?
There’s a lot of problems with this kind of system (I know from experience).
A grading system is meant to effectively evaluate a student’s performance in a subject. Students with high grades understand the subject very well. Those with low grades don’t. This tells the school, the student, and the parents how that student is doing in the subject, which determines if the student needs more help, needs to try harder, needs to be moved into easier classes, and whether or not they have an aptitude which can drive future school, career, and life decisions.
As a short example: I did well in math and science. I did not do well in english and history. My brother, OTOH, kind of screwed up everything despite having a high aptitude, but excelled in music. I became an engineer, he became a musician.
Another problem with this kind of system is that it completely ignores incentives. It assumes that every student is “trying their best,” and that bad grades are “accidents.” The reality is that if you lower the standards, kids will just do less. I had so many kids who would just give up for weeks at a time and consciously decide to just take the 50, as they’d been trained to since they were in 1st grade.
And BTW, when people say 50% of success is showing up, that’s not meant to be taken literally. It means that it puts you in a position to succeed, not that it is success in and of itself. As I type, I can hear the guy with the trimmer outside my window. His boss isn’t going to give him half pay if he shows up and doesn’t cut any of my grass. The phrase means, “Okay, you made it. You goy out of bed and you got here. Now that you’re here, you’ve got nothing better to do than to get some work done. Here’s the trimmer, now go and trim the edges of #17.”
The last point I want to make is that when kids get artificially passing grades in algebra 1, they go on to algebra 2, which they aren’t remotely prepared for.
Instead of giving a kid a 50%, a better system is to have them retake the test, with some small penalty built in to incentivize them to have their shit together the first time through. If they can ultimately actually pass the class, even if it requires a few retakes and tutoring sessions, that’s a hell of a lot better than just giving them the passing grade.