I want to write a sentence
'There is a large gap in the background between/among students'.
I am struggling to figure out the correct answer, even though I looked at similar questions. On one hand I think the answer should be among, because there are many students. But on the other hand, the way I'm thinking about this is kinda like I take two students at a time and compare and conclude there is a large gap, so maybe it should be between? I'm getting rather confused with this. Any clarification would be appreciated! Thank you!