English as a Foreign Language
- The George Washington University offers intensive, advanced, elective, and tutorial ESL courses.
- http://www.gwu.edu/~efl

LanguageOne - English for Foreigners
- Offers ESL immersion programs, courses for professionals on pronunciation, accent reduction and public speaking as well as TOEFL preparation courses.
- http://languageone.com/eng/engprof.html

English in the U.S.A. at the International Language Institute
- Offers intensive and semi-intensive ESL and TOEFL preparation in private tutorials and special groups.
- http://www.transemantics.com/

LADO International College
- Offers ESL courses for students and a TEFL Certificate Program for teachers.
- http://www.lado.com/

International Center for Language Studies
- Offers an intensive ESL program and more than 70 foreign languages. Housing assistance and information on living in the city.
- http://www.icls.com/

Inlingua Language Service Center
- ESL courses, translation, and interpreting for travel, technology, science, business, and pleasure.
- http://www.inlinguadc.com/