The Holiday Project seeks volunteers to help assemble 8,000 to 10,000 artificial flowers, which will be distributed during the winter holidays at nursing homes, hospitals and other institutions. Volunteers also are needed to respond from home to calls to the Holiday Project. For information, call Bobby at 703-370-1156.

Greenbelt Park, a part of the National Park Service, seeks volunteers to walk trails and report on their condition, and to update and revise the park's World Wide Web page. Web page experience is required. In addition, volunteers are needed to help answer phones and greet campground visitors. Four-hour shifts are available seven days a week from 8 a.m. to noon and noon to 4 p.m. For information or to volunteer, call Kevin P. Barry at 301-344-3944.

Pathways Schools, which serve children ages 9 to 21 with emotional and behavioral problems, need volunteers to work with a student under a teacher's supervision between 8:30 a.m. and 1 p.m. school days. Volunteers are especially needed in math and reading. Volunteers also are needed for field trips and to work in the school office, assisting with clerical tasks. For more information or to volunteer, call Lindsay McLaughlin at 301-681-4112, before 2:30 p.m. weekdays.

Baptist Senior Adult Ministries of the Metropolitan Area seeks volunteers for its adult-care centers in Bowie, Brentwood, Greenbelt and the District. Volunteers are needed to lead arts and crafts groups, be visitors and assist with activities and lunch. Shifts are between 10 a.m. and 5 p.m. For information or to volunteer, call 202-626-5782.

IONA Senior Services seeks volunteers to help serve lunch to seniors, operate the site and telephone homebound seniors regularly to verify they are in good health. Volunteers also are needed to visit senior citizens one day a week, shop for groceries for homebound seniors, become adult day-care center aides and help staff the social club for seniors in the early stages of dementia or depression. For more information, call Alena Biagas at 202-895-9425.

PC Seniors, a program designed to help seniors become computer literate, seeks volunteers with knowledge of Microsoft Word and IBM-compatible computers. For more information, call Doris Anderson at 301-248-7004.

Byte Back, an organization that provides free computer training to inner-city D.C. residents, needs volunteers to teach five 90-minute classes during a five-week period. Classes include Windows 95, Microsoft Word, Excel, PowerPoint, Access and the Internet. For information or to volunteer, send e-mail to volunteer@byteback.org.

Prince George's County Department of Family Services' aging services division seeks volunteers to visit seniors in nursing homes and advocate for them. Volunteers will participate in an ombudsman program, which monitors nursing homes for compliance with residents-rights statutes and care quality, and in the resident complaint resolution process. Volunteers will complete a training program and then volunteer four hours a week for a year. Experience working in a health care environment is desirable but not necessary. For information or to volunteer, call 301-699-2684.

The Retired Volunteer Service Corps of the University of Maryland, College Park, seeks volunteers in the career center, the concert office, editing English for international graduate students, the Learning Assistance Service and the Writing and Art centers. For information, call Jed Collard at 301-226-4750.

Community Tax Aid needs volunteers to help low-income taxpayers prepare their tax returns this winter. Training and support sessions begin late next month. Volunteers will provide tax assistance from early February to April. Necessary supplies will be provided at one of the 12 Community Tax Aid sites in the region. Flexible hours are available. For information, call Jay Defibaugh at 202-785-5600. To volunteer, send e-mail to ctavol@aol.com.

To volunteer, please contact the agencies directly. To submit a notice for volunteers, fax to 301-952-1397, e-mail to pgextra@washpost.com or write to Volunteers, Prince George's Extra, The Washington Post, 14402 Old Mill Rd., Suite 201, Upper Marlboro, Md. 20772.