I have taught a subject called 'Operating Systems' for the first semester students in two batches. (in 2019 and 2021). In 2019, it is physical and in 2021, it is totally online. I have used some new approaches to make the online class interesting. I have the final grades of students in both batches. Can I write a paper by comparing the results of these two batches? I don't have a big idea on how to compare them? I feel like I can compare the results based on physical setting and online setting. Since the batches are different, can I do a comparison like that? I would like to hear from you.