1 colored dress for 100s of days

School: 1 colored dress for 100s of days
College: 100 colored dresses for 1 day
School: 2 note books for 1 subject
College: 1 notebook for all subjects
School: white pipe in teacher's hand (chalk)
Coll: white pipe in student's hand (cigarette)
School: Most frequent letter-Leave letter
College: Most frequent letter - Love letter
School: if we go itz boring
college :if we dont go its boring 
Regards,
Amit Seth.