Lots of organizations on campus (e.g. greeks) collect tests from their members and file them. This "helps" their members do better on tests. The situation you describe is basically one of the outcomes of organization resources vs personal resources in higher education.
Sometimes, it can work against the student. Particularly if the student doesn't attend class (low-level blow off class) and the teachers / method changes. I TAed an intro to programming course for non-majors. My fellow TA and myself created new tests for the class (it went from GWBasic to QBasic). A couple of students from one of the fraternities attended the 1st day of class and then the first test (missing the homework programs). I handed out the first test and got the following reaction: "This isn't the right test!". Oh well.
Sometimes, it can work against the student. Particularly if the student doesn't attend class (low-level blow off class) and the teachers / method changes. I TAed an intro to programming course for non-majors. My fellow TA and myself created new tests for the class (it went from GWBasic to QBasic). A couple of students from one of the fraternities attended the 1st day of class and then the first test (missing the homework programs). I handed out the first test and got the following reaction: "This isn't the right test!". Oh well.