I have taught some SBG courses in the past, and I am planning on converting all of my courses to SBG. I have enjoyed teaching these courses, I believe that students have learned more, and students also seem to enjoy the courses more (judging from comments and student evaluation scores).
One issue I have is keeping the number of standards down when I am designing a course. I am designing a discrete math course now, and I have 16 standards just for the logic portion! I still need standards on sets, relations and functions, combinatorics, and graph theory. If I end up with ~15 standards for each of these, I will be looking at a total of ~75 standards, which seems kind of silly.
Does anyone have resources on SBG design principles which could help me?