La Clinica del Pueblo hosts Health Sundays, a monthly health fair at local churches frequented by the Latino community. The program seeks professional volunteers, including doctors, nurses and health advocates, to staff the fairs and assist with diabetes education, HIV testing, cholesterol and blood pressure screenings. These events are free and open to the public. Call Joanna Matthews, 202-464-0145.

The Family Tree of Maryland needs people to help prevent child abuse and neglect by working to strengthen and educate families. Volunteers are needed to mentor teenage parents and families, teach parenting classes, assist with support groups, direct children's programs and staff a 24-hour crisis and referral hotline. Training is provided. Call 301-209-5254.

Greenbelt Park Campground needs a campground host for a temporary position beginning in mid- to late April and ending in September. The candidate must be people-oriented, enjoy the outdoors, have good communication skills and own a recreational vehicle or camper. Applications must be received by March 28. For more information and to obtain an application call Greenbelt Park, 301-344-3944 or visit www.nps.gov/gree/.

Habitat for Humanity of Prince George's County seeks skilled and beginning-level carpenters, plumbers, electricians, dry wall mechanics, bricklayers, roofers and office workers to help build a house in Camp Springs. Call 301-779-1912.

The House of Ruth of Maryland needs people with clerical, legal and writing skills to staff their Upper Marlboro and Hyattsville courthouse offices. Volunteers provide information to victims of domestic violence and assist lawyers on protective-order hearings and divorce and custody cases. A commitment of at least four hours a month is required. Call Monica Player at 301-699-7790.

Meals on Wheels of Central Maryland needs people to deliver meals to homebound residents of Laurel. A valid driver's license is required. Call Elizabeth Yan at 410-730-9476.

Pets on Wheels, Prince George's County, seeks pet owners who are willing to bring their dogs and cats to visit seniors in nursing and assisted-living homes and schools for handicapped children. Call 301-853-3330.

The Retired and Senior Volunteer Program of Prince George's County invites adults ages 55 and older to help children learn to read, prepare meals for the homebound, and provide support to nonprofit agencies in a variety of capacities. For more information call Ivin Myles, 301-699-2797.

-- Barbara Hinton

If you want to volunteer, contact the agencies directly. If you have an item for Volunteers, e-mail it to pgextra@washpost.com; fax to 301-952-1397; or write to Volunteers, Prince George's Extra, The Washington Post, 14402 Old Mill Rd., Suite 201, Upper Marlboro, Md. 20772.