To learn more about bilingual language development, take a look at these resources:
Administration for Children & Families | Dual Language Learners Toolkit
Harvard Graduate School of Education | Bilingualism as a Life Experience
ParentMap | Benefits of Bilingualism
ZERO TO THREE | Dual Language Learners in Early Care and Education Settings
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- Bilingual
 - a person who knows and uses two languages
 - Code mixing
 - mixing words from different languages in the same sentence or situation
 - Cognitive flexibility
 - the ability to quickly switch between different concepts or rules
 - Dominant language
 - is the language a bilingual is most skilled at understanding and/or speaking
 - Executive function
 - a set of mental abilities that help us plan, focus attention, problem solve, and switch between tasks
 - Language transfer
 - applying the knowledge from one language to another language
 - Monolingual
 - a person who knows and uses a single language
 - Simultaneous bilingualism
 - a person learns two or more languages from birth
 - Sequential bilingualism
 - a person first learns one language then learns one or more languages later