A research conducted by Stanford University found that by the time they reach 5th grade, English-language learners in San Francisco's public schools were equally proficient in English regardless of whether they had been in a bilingual program or had received all their instruction in English.

“Though ELLs who were in bilingual education programs in San Francisco lagged in the earlier grades, they also scored similarly on the state's academic tests and had virtually the same rates of reclassification to English-fluent status by 5th grade as their ELL peers who were in the district's English-immersion program.” Read the complete story here.