classes have credits related to how many hours/times a week you have the class.
you have a 1 hour class 4 times a week, that's 4 credits
if you have a 2 hour class 2 times a week, that's also 4 credits
some classes you have only once a week like seminars and shit. and those are 1 credit
labs at my school don't count as credit they are just labs for your class so if you're taking 13 credits like me this quarter it's not equivilant to 13 hours of class because I have two labs.
that's the generic run down of american universities. To me your 2.5 credits a semester is fucking weird and makes less sense.
