For the past two school years, I have done Standards Based Grading (SBG). I have done a 5 (6?) point scale:
I am not totally happy with the scale (I blogged about it here earlier this summer) and I got some great comments. But I'm not totally sold either. I am contemplating changes. I'm not totally certain which one(s) I am going to make, but this is what I am thinking:
1) If I keep the current scale, I think I am going to make the 0 a 0 in the gradebook (instead of 5/10). I had students who played the system and made no attempt on a skill but since it was a 50% going in the gradebook instead of a 0%, they were able to pass (when they really shouldn't have) because they did "just good enough" on enough other skills. I am thinking this may solve the problem I talked about earlier with students passing who really shouldn't have.
2) I am having second thoughts about using a 5 point scale. Our state test is on a 5 point (Limited, Basic, Proficient, Accelerated, Advanced), so staying with it wouldn't be all bad - it could correlate to that potentially. However, there are some things that appeal to me about a 4 point scale. There could be two levels of "not there yet" - students who have significant conceptual errors - and two levels of "more or less have it" - students who have the concept but have other errors not related to the concept or students who truly understand the concept. The 4 point scale may be easier for me in grading. However, I'm not sure how I would correlate it to percentages. It seems that, as I have looked at others scales, more tend to be on a 4-point scale rather than a 5-point scale (not that what everyone else is doing is going to sway me).
Anyone have some guiding thoughts to help me here? I'd like to get this issue straightened in my head sooner rather than later. We have about 4 weeks until school starts, so I guess I better figure this out...