Doris,
In some courses, EC is probably okay. In my medical courses, awarding EC could have dangerous results, as students need to know the material. If a student is missing a lot of time, perhaps a LOA is needed, or retaking the class. But I have difficulty for my classes giving EC points for assignments when the assigned work has not been completed. It's not fair to other students, and may not even be safe. However, I believe each instructor and institution has to decide what works best for them.
Barry Westling