How about zero pull-ups? I tried doing some in P.E.
class once, and made a complete ass of myself. Worse yet, it was in
front of the guys...
?!?!? Unless you're gay (which is ok, it's a personal choice to
be respected), I would think it would be worse if it was in front
of girls...
eh, i can't do even 1 pull up leh... must start from
very basic...
Here's a technique for those struggling to do pull-ups (it was
first taught to us by an Army Seargent during BMT, and later I
started teaching my secondary school students this technique)
:

At the moment of pulling up, jerk your legs/knees upwards
towards your
chest. (NOT fully shown in photo).
Note that this technique is for the purpose of doing the maximum
number of pull ups (eg. when you've maxxed out your capacity, or
you're a beginner just struggling to do pull-ups), and is NOT for
the purpose of isolating muscles (eg. biceps, lattissimus dorsi,
etc) in bodybuilding.
So if you're a beginner in pull-ups still struggling to do your
first pull up, go ahead and use this technique to help you gain
confidence and workout your pull-up muscles (esp. biceps), until
you can do your first 'standard' pull-up (ie. without jerking up
your legs/knees).