I've searched moodle.org and Google for solutions to our issue without success. It seems the search terms to describe what we need are hard to pin down and are formal names for other parts of Moodle.
We need to be able to run range-based grade reports. For example, one group might need a report reflecting Quiz 11 - Quiz 32, but another group that needs a report from Quiz 10 - Quiz 24. (And similarly across other categories)
Our scenario is that different groups in different school districts have different grading periods. You could think of it as different groups having the same grading periods, but progress at a different pace -- and the need would be the same.
We have many (20+) different groups and schedules in each course, so simply creating different courses for each is not a likely solution.
Our need will almost certainly requires an ad hoc reporting tool, as we often don't know about grade period requirements until the moment they are needed.
If anyone can point me toward a builtin feature, plugin, or even a strategy to develop a custom solution, I would be MOST appreciative! We are fairly new to Moodle, but embracing it fully and getting up to speed as fast as we can.