The Defense Language Institute (DLI) is a United States Department of Defense (DoD) educational and research institution consisting of two separate entities which provide linguistic and cultural instruction to the Department of Defense, other federal agencies and numerous customers around the world. The Defense Language Institute is responsible for the Defense Language Program, and the bulk of the Defense Language Institute's activities involve educating DoD members in assigned languages, and international personnel in English. Other functions include planning, curriculum development, and research in second-language acquisition. Overview The two primary entities of the Defense Language Institute are the Defense Language Institute Foreign Language Center (DLIFLC) and the Defense Language Institute English Language Center (DLIELC). DLIFLC is located at the Presidio of Monterey in Monterey, California, and DLIELC is located at Joint Base San Antonio - Lackland Air Force Base, Texas. Defense Language Institute Foreign Language Center The institute offers foreign language instruction in more than two dozen languages to approximately 3,500 students on a schedule that extends throughout the year. Courses are taught seven hours per day, five days a week, with the exception of federal holidays and training holidays. The duration of courses range between 36 and 64 weeks, depending on the difficulty of the language. The military also uses private language programs such as CL-150. Defense Language Institute English Language Center The Defense Language Institute English Language Center manages the Department of Defense English Language Program (DELP), and is designated the 637th Training Group in 2015. The over 300 civilian members of the staff include the instructors who are qualified in the area of English as a second language. DLIELC is accredited by the Commission on English Language Program Accreditation, which is recognized by the US Department of Education. DLIELC is divided into three resident academic training sections: General English, Specialized English, and Instructor Development. Depending on the needs of the students, training can range from nine weeks (in Specialized English, for example) to 52 weeks in General English. Some students arrive with only minimal English capabilities, then train to a predetermined English comprehension level (ECL) in General English. Annually, students from over 100 countries enroll in the DLIELC resident training programs. Training is paid by the host country (Foreign Military Sales) or through US grant assistance programs such as International Military Education and Training Programs. In addition to DLIELC's mission to train international students, DLIELC is responsible for