Good girl gone bad.. temorarily

Always portrayed as the 'good girl'
when that's not really me
of course you'd say I'm 'perfect'
that's just what you want me to be

I'm a rebel on the inside
but at the moment I can show it
because this good girl's getting me somewhere
and right now I just can't blow it

I've got the grades to go so far
but if I forget to mention
the bad girl's really who I am
A's? or sitting in detention?

so for now you'll see the angel
halo, wings, and all
but during summer I'm the devil
again the angel in the fall ;)