The number of elementary Mandarin dual language immersion (MDLI) programs continues to grow across the United States. The lack of available and proven effective Mandarin language arts curriculum and assessments aligned to state and world language standards, including age-appropriate and high-quality reading materials, remains a serious issue for…

The purpose of the investigation was to examine the developmental trajectories of bilingual preschoolers' comprehension of Spanish and English and to determine whether a lengthy summer vacation impacted children's development during the preschool years. Participants included 83 bilingual children who were followed over a 2-year period during which…