How do I set boundaries with nosy coworkers who ‘just want to learn’?

i have been at this job for a few months and some of colleagues who started out with me have been making me somewhat uncomfortable. I don’t really know the reasons but they finish early or will pause to run to my desk whenever someone above is helping me out with something. I know it is important to learn together but they want to be there 24/7 and also try to micro-manage me to show off to the supervisors, pointing out mistakes or demanding me to send documents to them. I already highlighted to them that this makes me uncomfortable but they don’t care, just saying they want to learn. Yet they are not open to criticism on their own. Any suggestions to deal with persistent people who leech even if they are unwanted?

How do I set boundaries with nosy coworkers who ‘just want to learn’?
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