HARFORD SCHOOLS -- Harford County Board of Education will hold a business meeting at 7:15 p.m. at 102 S. Hickory Ave., Bel Air. The agenda includes action on the 2008 budget and on charter school applications.
BALTIMORE CITY SCHOOLS -- The Baltimore City Board of School Commissioners will meet at 6 p.m. at 200 E. North Ave. It is expected to receive school closure recommendations.
HOWARD SCHOOL BOARD -- Howard County Board of Education will meet at 4 p.m. and at 7:30 p.m. in the boardroom at the Department of Education, 10910 Route 108, Ellicott City. A hearing will be held at the 7:30 p.m. session on a proposal to acquire 41 acres on Marriottsville Road. 410-313-7194.
ROBESON TALK -- Paul Robeson Jr. will speak at 7 p.m. at the Enoch Pratt Free Library's Wheeler Auditorium, 400 Cathedral St. He will discuss his new book, A Black Way of Seeing: From "Liberty" to Freedom, as part of the Eddie and Sylvia Brown Lecture Series.
PETS EXPO -- The World of Pets Expo will be held from 2 p.m. to 7 p.m. at the Maryland State Fairground, 2200 York Road, Timonium. It will continue from 10 a.m. to 7 p.m. Saturday and 10 a.m. to 5 p.m. Sunday. Adult admission is $8. 410-374-5964 or www.worldofpets.org.
BASEBALL SHOW -- Baseball's Best, an autograph and memorabilia show, will take place from 10 a.m. to 6 p.m. at the Baltimore Convention Center, 1 W. Pratt St. It also will run from 9 a.m. to 6 p.m. Saturday and from 10 a.m. to 6 p.m. Sunday. Admission is $10. 973-808-1740 or www.baseballsbest2007.com.
POLAR BEAR PLUNGE -- The 11th annual Maryland State Police Polar Bear Plunge for Special Olympics will take place at 2 p.m. at Sandy Point State Park off U.S. 50/301 near Annapolis. Registration will begin at 11 a.m., and participants are required to bring a minimum of $50 in pledges. Admission for spectators is free. www.somd.org/plunge.
WINTER HIKE -- There will be a winter tree and shrub hike from 12:30 p.m. to 2:30 p.m. at Otter Point Creek, 700 Otter Point Road, Abingdon. Ages 8 to adult can take a free hike with a naturalist. Registration is requested. 410-612-1688.
ARMY BAND -- The U.S. Army Field Band will give a performance in its Spring Chamber Music Series at 3 p.m. Sunday at Christ Episcopal Church, 6800 Oakland Mills Road, Columbia. Admission is free. 301-677-6586 or www.armyfield band.com.