Nope! If you would like a verified certificate from edX, you can pay for verification at any point, even after completing all of the coursework. Do I have to pay for verification before starting the course? If you wish to get the green banner back, you can complete whatever assessments are missing for the current version of the course, but your free CS50 Certificate is still available at, and eligibility for a Verified Certificate is unaffected so long as you saw the green banner atop your gradebook at least once. Your gradebook will only ever reflect your completion status of the current version of the course (which is now CS50x 2021), even if you have completed the course in a prior year. Why does my Gradebook no longer show me as having completed the course?ĬS50x is a course that spans multiple years, but has a content refresh on 1 January each year. Certificates I completed CS50x in 2020 (or prior). Per a question that appears below, you have been credited with having completed the full “week” (including the lab) in CS50x 2021 if you completed the corresponding week of CS50x 2020. If I completed a “week” in CS50x 2020, do I now have to complete the “lab” as part of that corresponding week in CS50x 2021. Yes! You may resubmit we will only count your most recent submission towards your progress. If I submitted a problem and did not reach the 70% passing grade, can I resubmit? If you submit both, the one with the highest grade will count towards your overall course progress. You don’t get any extra points for doing the “more comfortable” problems. For reference, in the Fall 2019 Harvard class, only 20-30% of students submitted the “more comfortable” problems. It would be better for you to skip the problem than to become so frustrated as to drop out of the course entirely. If you find yourself really struggling with the “more comfortable” version, you should switch to the “less” version (or if you’ve already completed that, simply move on and perhaps revisit in a later week). As such, they may require more concepts than have been covered in the course so far. The “more comfortable” are the “challenge” version, designed for students who consider themselves more comfortable due to prior study/experience before this class. The “less comfortable” are what you might consider the “standard” version of the problem, designed for students who have little or no prior experience. In some earlier problem sets, you’ll have a choice between a “less comfortable” and a “more comfortable” problem. What’s the difference between “less comfortable” and “more comfortable” problems? Do I have to do both? Nope! CS50 at Harvard does have a test and quiz, but CS50x does not.
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