In a story yesterday on a D.C. school board contract dispute, the content of notarized statements from more than 60 school-services workers was incorrectly reported. The story should have said the affidavits, filed in D.C. Superior Court by the Teamsters union, stated that a contract negotiated by the American Federation of State, County and Municipal Employees was rejected at a July 10 meeting. The Fourth Annual Washington Reggae Festival will be held Sunday, noon to 10, at the Banneker Recreation Center at Georgia Avenue and Barry Place NW, across from Howard University. Yesterday's Weekend section incorrectly listed the day of the event. For more information, call 232-8226.

Washington's alternative music scene is more than just alive -- it's kicking and screaming. If you ever doubted it (better yet, if you've always known it), just check out either one of this Saturday's free concert happenings:

* The Banneker Recreation Complex is hosting a dreadlock holiday from 11 to 10:45. It's the "Fourth Annual Reggae Festival," and at least 13 reggae bands -- including Ras Karbi, Chin Africa Reggae Band, Calabash Reggae Band with Sister Carol ("The Black Cinderella"), and Carl Malcolm and The Positive Vibration Band -- will keep the tempo up. Ethnic food and crafts will also be on sale. The complex is at Georgia Avenue and Barry Place NW, across from Howard University. 232-8226.

* Meanwhile, back at the Mall, the Sylvan Theater will be the scene of "Unity '85 Nu-Music Festival," an assemblage of some of the best funk, punk and new wave sounds in town. It's from 1 to 7 p.m; scheduled bands are Age of Consent, Subterraneans, Unclassified, Submensas, Sex on TV, Modest Proposal, Choice and Mission Impossible. The Sylvan Theater is at 15th Street and Independence Avenue SW, on the Washington Monument grounds. If you're taking Metrorail, exit from the Blue or Orange lines at the Smithsonian station. 588-1281.