Do colleges really look at improvement, or just overall?

<p>Freshmen year I took all 'normal' classes- ended with a 3.45 GPA.
Sophomore year, I took all accelerated classes ('accelerated' being the level between normal and honors)- ended with a 2.7 GPA
Junior year (this year), taking all accelerated classes except 1 AP (but I'm self studying for another one). Expecting to end with at least a 3.7 or 3.8.</p>

<p>Have I already ruined my chances for college/scholarships?</p>