This article recounts three studies that portray an evolution from research examining the effects of researcher-designed instructional interventions to research examining the impact of helping teachers to design their own instructional interventions. Study 1 investigated the effects of an instructional treatment designed by the research team on…

Two-way immersion (TWI) programs in the US are not reaching their minority language learning potential. While English home language (EHL) students develop functional proficiency, their minority language (e.g., Spanish) remains grammatically inaccurate. Spanish home language (SHL) students may also develop non-native-like aspects. Scholars suggest…

English language learners (EL) are the fastest growing sub-group of the student population in California, yet ELs also score the lowest on the science section of the California Standardized Tests. In the area of bilingual education, California has dramatically changed its approach to English learners since the passage of Proposition 227 in 1998,…