how well are dual-language immersion schools doing?

"Dual-language immersion (DLI) programs — which provide both native English speakers and English learners with general academic instruction in two languages from kindergarten onward — are proliferating rapidly in the United States. Although precise counts of DLI programs are not available, recent estimates place the figure between 1,000 and 2,000 nationally, with substantial recent growth in Utah, North Carolina, Delaware, and New York City."

Dual-Language Immersion Programs Raise Student Achievement in English | RAND

While roughly half the global population speaks at least two languages, only about 20% of U.S. residents can say the same.
Dual-language immersion programs, in which academic content is taught in two languages, help children become bilingual and offer a host of other benefits.
“The programs are really, I think, a silver bullet to ensure that all students achieve success in school and in life,” says Martha Hernandez, executive director of the language advocacy group Californians Together.
Dual-language immersion programs facilitate biliteracy – the ability to speak, listen, read and write proficiently in two languages – by taking advantage of young children’s propensity for language acquisition. Most programs start in kindergarten and follow children through elementary school, and some extend into middle or high school.

4 Benefits of Dual-Language Immersion Programs

"A report by The Century Foundation (TCF) has found that the number of ELs in dual-language immersion (DLI) programmes is falling compared to their English-dominant counterparts. Research conducted over a five-year period suggests more English-dominant students are being enrolled in the schools, causing ELs to miss out on key education."

US dual-language schools failing English learners | E L Gazette 

The number of English learners is shrinking at many dual-language immersion schools while the number of English-dominant and white students is increasing, according to a new analysis released by The Century Foundation and Children’s Equity Project.

Number of English learners shrinks at many dual-language immersion schools | EdSource

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