‘THEY CAN’T SILENCE US.’ INSTAGRAM ACCOUNTS RECOUNT RACISM AT L.A.’S ELITE PRIVATE SCHOOLS. Black at Harvard-Westlake. Dear Flintridge Sacred Heart Academy. Black at Oakwood School. Oaks Christian Stories. Dear Polytechnic School. These are among the Instagram accounts linked to some of L.A.’s most elite private schools — but created by students and alumni who are going public with personal stories of racism that have otherwise gone unheard.