College Park Youth/Family Services seeks volunteers for the annual Halloween program, to be held 10 a.m. to noon Saturday at Duvall Field in College Park. Call Ms. Sims, 301-474-1210.

The Family Tree of Maryland needs compassionate people to help prevent child abuse and neglect by working to strengthen and educate families. Volunteers are needed to mentor teen 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.

Habitat for Humanity, Prince George's County, needs carpenters, plumbers, dry wall installers, painters, roofers, brick masons and electricians to help build the program's next home in Camp Springs. Experience in any of the above is preferred, but those who are willing to work and learn are welcome. Call 301-779-1912.

Helping One Student to Succeed (HOSTS) is an academic structured mentoring program that pairs one student with one mentor. Those with an interest in literacy mentoring are asked to call Mount Rainier Elementary School, 301-985-1810, Ext. 256.

High Point High School needs tutors in reading, writing, history, biology, chemistry, environmental science and all levels of math. Tutoring sessions are from 2:30 to 4:15 p.m., Tuesdays and Thursdays. Volunteer for one or both days. Training is provided. Call Gloria Coliton, 301-572-6400, Ext. 291, or e-mail volunteerhp@hotmail.com.

The Literacy Council of Prince George's County needs volunteers to help adults learn to read and write. A training workshop is scheduled, 10 a.m. to 4 p.m., Nov. 2, 9, and 12, at the Hyattsville Municipal Center, 4310 Gallatin St., Hyattsville. Cost of the basic workshop is $25; English as a second language workshop is $35. Call 301-699-9770.

The Maryland-National Park and Planning Commission is seeking enthusiastic people to assist with the third annual Gingerbread House Contest and Show at Darnall's Chance Museum in Upper Marlboro. The event is scheduled for Nov. 29 and 30 and Dec. 1, 7, 8, 13 and 14. Event times vary; positions are available in registration, admission and gift shop sales. For more information, call the Volunteer Services Office, 301-249-7208, or Darnall's Chance Museum, 301-952-8010.

The National Multiple Sclerosis Society needs two people, ages 16 and older, to assist with a newly formed water exercise class in Bowie. No swimming experience is necessary; training will be provided. Call Kristina Price, 202-296-5363.

The Youth Popular Culture Institute needs volunteers to help prepare for an event being held Oct. 31 to Nov. 3 that aims to empower youths to make positive changes in their communities. Volunteers are needed to serve in media relations, administration, event marketing, workshop monitoring and hospitality. Call 301-877-3824.

-- Barbara Hinton

If you want to volunteer, contact the agencies directly. To list your organization in Volunteers, send e-mail 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.