> Technically, it's possible that he just studied very very hard and his code and grammar improved. As an early procrastinator (rehabilitated perhaps?) I've ha

> Technically, it's possible that he just studied very very hard and his code and grammar improved. As an early procrastinator (rehabilitated perhaps?) I've had a history of doing very well on finals through cramming. In your student's case it might very well be more likely they are cheating, but those unlikely but possible students who study extra hard to recover their grades for a final deserve the benefit of the doubt. How unlikely can academic recovery get? I spent an entire semester completely lost in a second level Macroeconomics course... ... I was able to read and write chapter summaries of a semester and a half of content (about 15 chapters, corresponding to the first level and the second level courses) in a single weekend and aced the exam, with the highest marks in the class. That was the hardest I've ever crammed in my life and I had trouble speaking in the hours that followed the study session. I later got a recommendation letter from that prof, totally worth it.