Quick: Who are the nation's most relevant civil rights leaders? Neither Jesse Jackson nor Al Sharpton fit the bill. And it isn't Benjamin Todd Jealous, the far lesser known president of the increasingly irrelevant National Association for the Advancement of Black People...... These days, civil rights leadership can be claimed by folks such as Geoffrey Canada, CNN commentator Dr. Steve Perry, and Gwen Samuel....... Each one is taking on the biggest concern among black families -- and families throughout the nation overall -- in this century: the reform of America's lackluster traditional public schools. As head of the Harlem Children's Zone,