Extra credit take home assignments (short paper or half page on a topic, report on a site visit, event, …) and bonus points should be avoided. However, if allowed by an instructor, they should be offered to the entire section, not a subset of students, and realistically accessible to all of them (think disabilities and affordability for example). Such work cannot replace a test grade or count as such and will still represent no more than 5% of a test (quiz or exam). No extra credit points can count directly towards a final grade, lecture or lab. The same applies to bonus points.
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