This is an acurate version we used it in my guitar class.

Intro:
e|-3-3-3-3-3-3-3-3-3-
b|-3-3-2-1-1-0-1-2-3-
g|-0-0-3-3-3-0-0-0-0-
d|-------------------
a|-------------------
E|-------------------

Verse:
listen to the song for the struming paterns
fig 1:
e|-3-3-3-3-3-3-3-3---------0-0-0-0--------------|
b|-3-3-3-3-2-2-2-2---------1-1-1-1--------------|
g|-0-0-0-0-3-3-3-3---------0-0-0-0--------------|
d|-0-0-0-0-0-0-0-0-3-3-3-3-2-2-2-2---------3-3--|
a|-2-2-2-2-0-0-0-0-3-3-3-3-3-3-3-3-6-6-x-x-3-3--|
E|-3-3-3-3---------1-1-1-1---------3-3-x-x-1-1--|
play fig 1 twice(i think I'm not 100% on it though then play:
fig2:once again I'm not sure how many times you play it.
e|-----------------------------
b|-3-3-------3-------3-------3-
g|-2-2-----0-------0-------0---
d|-0-0---0-------0-------0-----
a|-0-0-2-------1-------2-------
E|-----------------------------

Chorus:
x-hold your hand over the last chord you just played and scratch it.
listen to the song to get it.

e|-------------------------
b|-------------------------
g|-------------------------
d|-------------------------
a|-6-6-x-x-x-x-3-3-x-x-x-x-
E|-3-3-x-x-x-x-1-1-x-x-x-x-

Bridge:
This has a weird strumming pattern so listen to the song.

e|-----------p------------------------------
b|-----------a-----------p------------------
g|-----------u-----------a---0-0-0-0-0-8-7--
d|-5-5-5-5-5-s-5-5-3-3-3-u-3-2-2-2-2-2-8-7--
a|-5-5-5-5-5-e-5-5-3-3-3-s-3-3-3-3-3-3-6-5--
E|-3-3-3-3-3-!-3-3-1-1-1-e-1----------------

Song order:
(at least what i think it is all the parts are right though im pretty sure about it)

Intro 
Verse
Chorus
Intro 
Verse
Chorus 
Bridge
Intro 
Chorus 
Bridge 
Intro

I think thats how it goes.