Careful there, folks. Standards based grading isn't gonna fix everything. So before you go and throw yourself in front of the train, there's a few things you should know.
1. The ideas behind SBAR aren't new. Teachers were caring about student learning like 10, 20—3000 years ago. Back then, they called it "doing their job."
2. You're still going to have to distill all this learning into some sort of a letter grade thereby making it a shadow of the real thing.
3. All perfect assessments aren't. (see #3 here)
4. Don't overdefine this stuff. This will keep a good idea from becoming just another term in a long list of edujargon that forces people to earn a Master's Degree just so they can learn how to metacognate their pedagogical assessment practice and use it in a sentence.
5. I typed this on my phone with my right thumb during nap time.
Other than that, I like standards based grading. Just trying to keep it real.