Oh my God. What kind of lecture is this... how to use a Mac book? That's a disturbingly insane amount of macs out there. Yikes! (I'm a true and dedicated PC guy
)
If this is going to be your main computer, like not just a note taking one... you're better off getting something with a bigger keyboard like a 13-15 incher. With the keyboard, make sure it's not super loud. Nothing like being in a quiet library with a CLAK CLAK CLAK CLAK silence... CLAK CLAK... it just gets really really annoying.
And get a light notebook, your shoulders will thank you later.