You just might be asking about The Lab School of Washington, D.C. This school has earned an excellent reputation as a K-12th grade day school, which offers an exemplary education to students with learning disabilities. It was selected as a National Blue Ribbon School of Excellence by the U.S. Department of Education. Sally Smith, who is the director of the school in addition to serving as the Head of Graduate Programs in Special Education: Learning Disabilities at American University, has written many books about individuals with learning disabilities and enjoys a reputation as an international specialist in the field. Visit the school's website for a complete listing of Ms. Smith's books and accomplishments.
If you are interested in finding out more about other excellent private schools for children with learning disabilities, you might try The Directory for Exceptional Children: A Listing of Educational & Training Facilities 1994-95 (latest edition) edited by Porter-Sargent. This helpful book sells for about $60, but should be in the reference section of your public library. It gives information about and reviews of private residential and day schools for students with disabilities.