A kindergarten class at a Sacramento, Calif., elementary school spends nearly the entire day learning in Hmong. Educators there believe the students will learn more if taught in their native tongue. Each year, as the students get older, the amount of instruction in English will increase by 10%. Another school in Sacramento has offered Spanish immersion for 20 years, splitting the day between Spanish and English. School officials say the immersion method helps students perform better on standardized tests.