 They examined evidence from prior research studies, examined descriptive documents from the study participants, conducted phone interviews and email exchanges with executive directors and school district administrators, and utilized other research on language-immersion models.In addition to qualitative evidence, they analyzed quantitative data such as school test scores and demographic.Through their comparison of test data, Aguilera and LeCompte found that there was an increase in performance on state benchmark exam scores by the Ayaprun- and Dine’- immersion students.