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90% of Poles have university degree? [57]
I'm gonna give you a quick example of law faculty in Katowice
there are 700 students attending "weekend courses" - that means they study only on weekens, and around 200 students attending normal courses. Of course one way or another the first and second number will be dereased during the first year (weekend students even by 300) but it still gives you A VERY LARGE number of people who didn't have many subjects which ordinary full-time students had, do the math. Those people have a much smaller knowledge. Of course you can be a good student of the weekend courses - but most of these people are those who didn't score the right amount of points during the entry exam because they were lazy or because they took into account that their parents gonna pay for them anyway therefore they are still slacking off later on.
It works because the university wants to earn, and it gets a LOT of money from students from the "weekend courses". Actually the law faculty of the Silesian University in Katowice is the richest of faculties they have.
There are universities with very poor education quality. On the other hand there are those that have a much much steeper entry conditions - for instance Silesian Medical University where even if you want attend the extramural paid studies you need to have a proper entry score to get in, not just the money as it is at some other units.
Oh of course by entry exam I mean mature - and at some university additional exams.