Assessing the Impact of a Heritage Language Intervention in Preschool: A Controlled Trial with Dual Language Learners from Immigrant Families

Key Points

• The study shows significant improvement in heritage language development among dual language learners (DLLs).
• Children participating in the intervention experienced a notable increase in their heritage language skills—up to 30%.
• Observational analysis using controlled trials to assess the efficacy of the intervention across various settings.
• The findings support implementing such interventions in educational settings to enhance language skills for DLLs.