 Dual language programs are considered to promote "additive bilingualism," students' primary language is developed and maintained as a second language is added.Another type of program that is not considered dual language is foreign language education in which students receive less than half a day studying in the partner language and often study only language arts and literature in that language, as opposed to content area subjects, such as mathematics, science, and social studies.There are two main variations based on the amount of time spent in the partner language and the division of languages.