My friend dropped out of high school and got her GED at 16 then went straight into 2 years of community college. By 20, she graduated from University of Washington.

I know TONS of people who took the same route (not a bad move, non?), but I wouldn't exactly call it 'graduating high school early.'
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"What I do know is that if Karen Carpenter and Mama Cass Elliot had shared that sandwich they'd both be alive today." -Michael K