Thursday 1CHILDREN IN SPECIAL EDUCATION, support group for parents. Babysitting available, reservations requested. 10 a.m.-noon, Jefferson-Houston School for Arts and Academics, 1501 Cameron St., Alexandria. Free. 703-706-4552. SENIOR TABLE TENNIS, all levels, instructor available. 10 a.m.-noon Thursdays, Walter Reed Senior Center, 2909 S. 16th St., Arlington. Free. 703-228-0955.

MOBILITY PROGRAM, for seniors, discussed by nurse Diane Hendel and physical therapist Julie D. Ries. 10:15 a.m., Walter Reed Senior Center, 2909 S. 16th St., Arlington. Free. Registration required. 703-228-0955.

Saturday 3TAI CHI FOR SENIORS, all levels. 9 a.m., Culpepper Garden Senior Center, 4435 N. Pershing Dr., Arlington. Free. 703-228-4403.

Monday 5PICKLEBALL FOR SENIORS. Tennis with a short net. Practice and games weekday mornings, Thomas Jefferson Community Center, 3501 S. Second St., Arlington. $10 annual registration. 703-228-4745. AQUA EXERCISE CLASSES, for seniors. 8:40-9:20 a.m. Mondays, Washington-Lee High School, 1300 N. Quincy St., seven sessions, $24.50; and noon-12:40 p.m. Tuesdays, Wakefield High School, 4901 S. Chesterfield Rd., 14 sessions, $49. Registration required. 703-228-4745.

SENIOR EXERCISE CLASSES, for strength and flexibility. 9 a.m. Mondays, Wednesdays and Fridays, Thomas Jefferson Community Center, 3501 S. Second St., Arlington. Each class, $3.50; annual registration, $10. 703-228-4745.

WALTER REED WALKERS, weekly program. Travel to Alexandria for a walk around Old Town. 9:30 a.m., Walter Reed Senior Center, 2909 S. 16th St., Arlington. $2.50. Registration required. 703-228-0955.

WEIGHT LOSS, Take Off Pounds Sensibly support group. 10 a.m., Lee Senior Center, 5722 Lee Hwy., Arlington. Annual fee, $24. 703-228-0555.

BRAIN AEROBICS, for seniors, word games and mental challenges conducted by senior adult specialist Rachel Thompson. 10:30 a.m., Walter Reed Senior Center, 2909 S. 16th St., Arlington. Free. Registration required. 703-228-0955.

ICE SKATING, for seniors, skates included. 10:30-11:45 a.m., Kettler Capitals Iceplex, Ballston Common Mall, 4238 Wilson Blvd., Arlington. $4. 703-228-4745.

DROP-IN LINE DANCING, for seniors. Taught by Pinky O'Neil. 1 p.m., Lee Senior Center, 5722 Lee Hwy., Arlington. $3.50. 703-228-0555.

IMMUNIZATION CLINIC, walk-in clinic for any incoming sixth-grader at Alexandria public schools to receive tetanus, diphtheria, pertussis (Tdap) booster shot if the student's last tetanus shot was before Sept. 5, 2001. Student must be accompanied by an adult and show immunization records. 2-7 p.m. Mondays-Tuesdays, through June 26, Alexandria Health Department, 4480 King St., Alexandria. Free. 703-824-6650.

TAI CHI WORKSHOP, for cancer patients. Maiky Tran teaches movements that focus on breathing, relaxation and meditation, along with isometric exercise to strengthen muscles and increase energy. 7-8 p.m., Virginia Hospital Center, Cancer Resource Center, 1701 N. George Mason Dr., Arlington. Free. Registration required. 703-558-0908.

OBSESSIVE-COMPULSIVE DISORDER, support group. 7:30-9:30 p.m., St. Andrew's Episcopal Church, 4000 Lorcom Lane, Arlington. Free. 703-250-1126.

Tuesday 6ALEXANDRIA BLOOD DRIVE, sponsored by Inova Blood Donor Services. 8 a.m.-4 p.m. Tuesdays, Thursdays and Fridays, and noon-8 p.m. Mondays and Wednesdays, Inova Alexandria Hospital, Health Education Center, 4320 Seminary Rd., Alexandria. Registration required. 703-504-3000.

SENIOR PILATES, beginners and intermediate classes. Beginners, 9:45 a.m., and intermediate, 10:45 a.m. Tuesdays, Madison Senior Center, 3829 N. Stafford St., Arlington. 14 sessions, $49. Registration required. 703-228-5285.

VOLLEYBALL FOR SENIORS, practice, 1:30 p.m.; games, 2:30 p.m. Langston-Brown Senior Center, 2121 N. Culpeper St., Arlington. Free. 703-228-4745.

SENIOR GOLF CLASS, for balance and coordination. 2 p.m., Walter Reed Senior Center, 2909 S. 16th St., Arlington. $45. Registration required. 703-228-4745.

EARLY-STAGE BREAST CANCER, support group, facilitated by an oncology social worker. 5-6:30 p.m., Virginia Hospital Center, Cancer Resource Center, 1701 N. George Mason Dr., Arlington. Free. 703-558-5555.

MERIDIAN-BASED THERAPY, for after cancer treatments, acupuncturist Kathe Ana demonstrates acupuncture, acupressure and neuromodulation. 7-8 p.m., Virginia Hospital Center, Cancer Resource Center, 1701 N. George Mason Dr., Arlington. Free. Registration required. 703-558-0924.

Wednesday 7SENIOR WALKING CLUB, weekly exercise program. Travel by van to Alexandria and walk along Mount Vernon Avenue from Glebe Road to King Street. 9:30 a.m. Meet at Culpepper Garden Senior Center, 4435 N. Pershing Dr., Arlington. $3. 703-228-4403. YOGA WORKSHOP, for seniors, taught by Peggy Finn. 10 a.m., Aurora Hills Senior Center, 735 S. 18th St., Arlington. Seven classes, $24.50. Registration required. 703-228-5722.

BLOOD PRESSURE SCREENING, for seniors. 12:30 p.m., Lee Senior Center, 5722 Lee Hwy., Arlington. Free. Registration required. 703-228-0555.

WEIGHT LOSS, Take Off Pounds Sensibly support group. 7 p.m., Mount Vernon Recreation Center, 2701 Commonwealth Ave., Alexandria. Free. 703-299-5788.

-- Compiled by RIA MANGLAPUS

To Submit an Item

E-mail: alexextra@washpost.com

Fax: 703-518-3001

Mail: Health Calendar, The Washington Post, Alexandria-Arlington Extra, 526 King St., Suite 515, Alexandria, VA 22314

Details: Announcements are accepted on a space-available basis from public and nonprofit organizations only and must be received at least 14 days before the Thursday publication date. Include event name, dates, times, exact address, prices and a publishable contact phone number.