its not necessary
you will just surf the net and chat with your friends, and thats even if you take the effort to bring your computer, and thats assuming you can motivate yourself to even attend class
nowadays lots of profs put all the notes online or make available a note packet, so at most you would just annotate these
how efficient is taking notes going to be in math class? i dont know what your major is... i suppose if it is history or something with lots of rambling lectures and not many symbols or computations typing could work.
and from firsthand experience, none of the people i knew with laptops EVER took it to class
dont try to scam your parents, the real reason you want it is bc it is an awesome toy
