A sampling of the many Washington-area groups that offer after-school, weekend and vacation activities for children ages 9-14:

Audubon Naturalist Society -- programs in nature and the environment from age 4 up; 8940 Jones Mill Rd, Chevy Chase, Md. (301) 652-5964.

American Red Cross -- Clown Corps and other volunteer projects, ages 13 and up; contact local chapters.

L'Academie de Cuisine -- gourmet cooking classes for 10 to 15 year olds; 5021 Wilson Lane, Bethesda, Md. (301) 986-9490.

Glen Echo Park -- drama, arts and crafts, photography; MacArthur Blvd., Glen Echo, Md. (301) 492-6282.

Reston Community Center -- movies, photography, dance classes; 2310 Colts Neck Rd., Reston, Va. (703) 476-4500.

Boys and Girls Clubs of Greater Washington -- walk-in and scheduled activities, including job training, educational activities, sports and recreation at 3 D.C. and 4 suburban centers. (202) 462-4438.

Metropolitan Police Boys and Girls Clubs -- walk-in sports, arts and crafts, tutoring, games and other activities for 6 to 18 year olds at 9 locations throughout the District.

YM & YWCA -- elementary school-based programs through Bowen Y (202-462-1054) and Urban Y (202-398-2600); yoga, dance, gymnastics at Bethesda Y (301-530-3725); contact other Y's for information on their programs.

National Capitol Area Council, Boy Scouts of America -- varied activities including outdoor activities, crafts, sports, vocational awareness through small groups for boys 7-18. (301) 530-9360.

Girl Scout Council of the Nation's Capitol -- in addition to joining troops, girls can participate as individual scouts in varied activities including crafts, trips, outdoor activities, consumer education and skills development at 10 activity centers throughout the D.C. area. (202) 337-4300.

Potomac Area Council of Camp Fire -- varied activities, trips, service projects for Camp Fire members. (301) 495-7833.

D.C. Department of Recreation -- fitness, sports, hobbies, games, arts, special events at 103 centers. (202) 673-7679.

Arlington County Recreation Division -- drop-in and structured activities including music, sports, arts, trips at 15 centers. (703) 558-2700.

airfax County Recreation and Community Services -- school-based programs at 40 sites; next season begins in the summer. (703) 385-5027.

ontgomery County Recreation Department -- some center, some school-based programs including dance, crafts, games, sports, drama; eastern area (301-593-9670); northern area (301-540-1300); western area (301-468-4210); Special Services. (301-468-4050).

Prince George's County Recreation Department -- varied programs including arts, sports, recreation at school sites and 26 community centers. (301) 699-2407.

Check-In Programs -- flexible care for 9 to 14 year olds; Potomac Area Council of Camp Fire (703-451-1481) and Reston Children's Center. (703) 476-8150.

Among resources for planning after-school time:

Center for Early Adolescence, University of North Carolina, Suite 223, Carr Mill Mall, Carrboro, N.C. 27510. (919) 966-1148. Publications on programming for 10 to 15 year olds and training for youth workers.

School's Out -- Now What? by Joan Bergstrom (Ten Speed Press).