In the Immersion Program core content curriculum is taught in Spanish, including language arts. Supplemental literacy instruction in English is also included in these classrooms. All teachers in the Immersion program are native Spanish speakers. The goal of the Immersion program is that students will leave the program able to read, write, and speak Spanish. Students who complete the Immersion program at Casa have been able to gain two years of high school language credit. Charter students usually enter this program in Kindergarten. Admission to the Immersion program after kindergarten is done in special circumstances after an initial written, oral and listening proficiency assessment.