Episode Description
In this episode, we explore one of the most important distinctions in bilingual education: additive versus subtractive bilingualism.
What happens to a child’s first language as they learn the school language?
Should it continue to grow — or is it replaced?
Key Concepts
Additive Bilingualism (The Goal)
- L2 is ADDED to L1
• Both languages continue to develop
• Home language is valued and visible
• Identity and family relationships are maintained
Subtractive Bilingualism (To Avoid)
- L2 REPLACES L1
• Home language is lost or underdeveloped
• School implicitly or explicitly devalues L1
Metalinguistic Awareness
Bilingual children often show heightened awareness of how language works because they compare systems (e.g., noticing word order differences).
Research on broader “cognitive advantages” is mixed. Large recent studies show small or inconsistent executive function effects once socioeconomic background is controlled.
What remains strongly supported:
- Conceptual transfer across languages
- Linguistic awareness
- Social and identity benefits
Translanguaging
Multilingual speakers draw flexibly from their full linguistic repertoire.
This challenges rigid “English-only” approaches and supports classroom practices that allow children to use all their language resources for thinking and learning.
Practical Implications for Teachers
Promote additive bilingualism intentionally
Make home languages visible and valued
Avoid English-only rules
Encourage flexible language use for thinking
Support families in maintaining L1
Recognise identity as central to learning
Understand that suppressing L1 does not accelerate L2 development
Coming Next
Episode 5: Deficit vs. Asset-Based Thinking – How Our Beliefs Shape Bilingual Learners’ Outcomes
References & Resources
Baker, C., & Wright, W. E. (2024). Foundations of Bilingual Education and Bilingualism (8th ed.). Multilingual Matters.
Cummins, J. (2000). Language, Power and Pedagogy: Bilingual Children in the Crossfire. Multilingual Matters.
García, O., & Wei, L. (2023). Translanguaging: Language, Bilingualism and Education. Palgrave Macmillan.
Grosjean, F. (2010). Bilingual: Life and Reality. Harvard University Press.
Recent meta-analyses on bilingual cognitive effects (2023–2024) available through major educational research databases.
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