The Treatment and Learning Centers (TLC) and The Katherine Thomas PreSchool 

• Address: 9975 Medical Center Drive, Rockville, MD 20850 
• Phone: (301) 424-5200 extension 153. 
• DIR® Professional Contacts:
• Shirley Anderson, M.S., Occupational Therapy, DIR® Certificate Candidate, Level III
• E-mail: sanderson@ttlc.org
• Shawna L. Page, M.A., C.C.C., Speech-Language Therapy, DIR® Certificate Candidate, Level II
• E-mail: Spage@ttlc.org
• Website: http://www.ttlc.org/