Any tips to get into bu and umass

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<p>I am a junior with a 2.9 GPA unweighted in almost all IB classes, have 650 on reading, 600 on math and 500 on writing sat scores.I have over 250 hour of community service and political activism and am a minority student .My grades were awful the first two years of high school but have been almost all A's this year and I think the trend will happen again next year with lots of AP's instead of IB's.Any tips to get into bu and umass?</p>