Students and their parents performed acts of service in honor of Martin Luther King Jr. day.
Korean Prime Minister Kim Hwang-sik sat in on a Korean language class at the school.
The organizers said the changes to TEDxHarlem were intended to increase access to the event.
Some community organizers criticize the inaugural TEDxHarlem event for not being 'grassroots' enough.
The conference about ideas and innovation will be held March 27 at the Apollo Theater.
Democracy Prep Public Schools took over the former Harlem Day Charter School.
More than 1,100 families applied for 50 kindergarten seats at the former Harlem Day Charter School.
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