The Northern Virginia Jewish Community Center invites single adults between the ages of 22 and 45 to participate in its fall co-ed volleyball league. Games will be played every Tuesday between Sept. 22 and Nov. 24 from 7:30 to 10 p.m. at Frost Intermediate School, 4101 Pickett Rd., Fairfax. Registration fee is $15 for members and $18 for nonmembers. Fee includes the cost of T-shirts, final party and awards. Sign-up deadline is Sept. 8. An organizational clinic for participants is scheduled for Sept. 15. For more information, call 323-0880.

Educational help is free for teen-age mothers who are dropouts or thinking about dropping out of school. The program, called Project Opportunity, has been organized through The Bryant Adult and Community Education Center in Fairfax County. Sponsored by a grant from the Virginia Department of Education, Project Opportunity offers young mothers a chance to complete a high school education. Counseling services, classes in parenthood, and job development and placement are also part of the curriculum. For information, brochure and application, call 768-0501 between 8 a.m. and 3 p.m. Monday through Thursday. Applications also may be picked up at the Bryant Center, 2709 Popkins La., Alexandria.

Handicaps Courageous, a support group for persons with special needs, invites prospective members to attend its next meeting at the Woodburn Center for Community Mental Health at 10 a.m. Sept. 3. Group members listen to one another and aid the community on issues regarding physical handicaps. The Woodburn Center is located at 3340 Woodburn Rd., Annandale. For more information, call R. Bloch at 451-2223 or Brenna Dean at 573-0523, ext. 298.

Remarks concerning the admissibility of videotaped interviews, testimony by a third party, and procedural mechanisms for the presentation of testimony in child sexual abuse cases will be heard in a public hearing at 10 a.m. Tuesday in House Room C of the General Assembly Building in Richmond. Those interested in addressing the Subcommittee Studying the Hearsay Rule and the Videotaping of Testimony in Child Sexual Abuse Cases (HJR 319, 1987) should contact Anne R. Howard, House of Delegates Clerk's Office, (804) 786-7681. For more information about HJR 319, contact Oscar Brinson, staff attorney, Division of Legislative Services, (804) 786-3591.