ATLANTA - Smaller classes, skilled teachers and extra help at a young age are the keys to helping black pupils perform on par with their white peers, a group of black lawmakers said Tuesday. And members of the National Black Caucus of State Legislators called closing the achievement gap a nationwide social issue on par with the struggles of the 1960s. "It's time to take action," said C.J. Prentiss, an Ohio senator and the chairwoman of the caucus's education committee."Unless we take action immediately on this, this will be the new civil rights movement."