2.Sheltered content instruction This model uses a content curriculum adapted to accommodate students’ limited proficiency in the language instruction. Consequently, sheltered courses are closely in keeping with the tradition of elementary and secondary immersion education in which L2 learners are separated or “sheltered” from native-speaking students. This sheltered arrangement places all second language learners in “the same linguistic boat,” thereby from the adjustments and simplifications made by native speakers in communicating with L2 learners and from a low-anxiety situation (Krashen, 1981)