most things ≠ most OF THE things


Most
students
ask questions.
common mistake: Most of students
[ a mix of both ]
Most of the students in my classroom ask questions.
(most - specific to those who are in my class)
Many students have a blog.
Many
of the students in my school have a blog.
(many - specific to those who are in my school)

A few
students had to pay again.               
(some)  (and everybody payed)

A few
of the students who payed had to pay again.
 
(a few - specific to those who payed)

Few
students had to pay again. 
(not many)
(from everybody)

Few
of the students who payed had to pay again.
(few - specific to those who payed)

http://www.d118.org/district/images/school-bus.jpg
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