A bilingual preschool can allocate its languages in four main ways: by person (each adult speaks one language), by time (a language per part of the day or per day), by activity or content (a language per type of activity), or by space (a language per area of the room). Most schools end up combining two or more, and the best choice depends on the staff team, the children's ages and home languages, and how much of each language children hear outside school.
Whatever the model, the decision only works if it is written down, understood by every adult and reviewed against what teachers actually observe. This article compares the four models, explains where they came from and where they go wrong, and ends with a practical checklist for drafting a school language policy that a new teacher could read on their first day and follow by lunchtime.
The four models side by side
The table summarises how each model works in a preschool room and what to watch for. The descriptions are general; any real school adapts them.
| Model | How it works | Strengths | Watch out for |
|---|---|---|---|
| By person | Each adult consistently uses one language with the children | Clear for children; each language has a living model | Depends on staffing; a child may avoid the less familiar adult |
| By time | Languages alternate by part of day, day or week | Easy to plan and audit; works with bilingual staff | Can feel arbitrary; urgent needs do not follow a timetable |
| By activity | A language is tied to a type of activity or subject | Builds rich vocabulary for each domain | A language can become tied only to "work" or only to "play" |
| By space | Areas of the room are linked to a language | Concrete and visible for young children | Hard to keep when children move freely between areas |
In Vietnamese bilingual preschools the most common arrangement pairs a Vietnamese homeroom teacher with a foreign or bilingual co-teacher, which naturally suggests a person-based model. In practice most schools layer a time or activity pattern on top, so that English does not disappear when the co-teacher is out of the room.
Allocation by person: where one person, one language comes from
The idea that each adult should keep to one language with a child is older than most people think. The French linguist Jules Ronjat described raising his son Louis in French and German in a 1913 study, following advice from his colleague Maurice Grammont that each parent should use one language consistently. The principle became known in English as "one person, one language", and it remains popular with bilingual families.
Translated into a school, it means the Vietnamese teacher speaks Vietnamese with the children and the English-speaking teacher speaks English. Its great strength is clarity. Young children quickly learn whom to address in which language, and each language has a real, warm person attached to it rather than being a classroom exercise. For a foreign teacher who does not speak Vietnamese, it is also simply the reality.
Its weaknesses show up in daily life. If the English-speaking adult is in the room for only part of the day, English exposure is limited to those hours. Children who are less confident in English may gravitate to the Vietnamese teacher for everything that matters, leaving the English teacher with the easy, cheerful moments but not the conversations where deep language grows. And strict adherence can become unkind: a two-year-old who is hurt needs comfort in a language she understands, not a lesson in consistency. Good person-based practice therefore keeps the principle for everyday talk while giving every adult permission to bridge when a child genuinely needs it.
Allocation by time: half days, alternate days and the 50:50 idea
Time-based allocation divides the timetable rather than the staff. A class might run mornings in one language and afternoons in the other, alternate languages by day, or switch by week. Time-based patterns are well known from dual language and two-way immersion programmes in primary schools, particularly in the United States, where "90:10" and "50:50" models describe how much instruction happens in each language, sometimes shifting towards balance as children move up the grades.
In a preschool, a time pattern has the advantage of being easy to plan and easy to check. A leader can look at a week and see whether English is really getting the share the school intends. It also works well with bilingual teachers who can comfortably teach in either language, because the language changes with the clock rather than with the person.
The risk is that the pattern feels arbitrary to young children and to adults alike. A child who wants to tell the teacher something important at ten past eleven does not care that the timetable says English. Time patterns also tend to tie languages to whatever happens to occur in that slot: if English always falls in the late afternoon, it becomes the language of tired children and pick-up time. Schools using time-based allocation should check which activities each language ends up attached to, and rotate them if one language is always missing the richest parts of the day.
A simple audit helps. For one ordinary week, a leader or a colleague notes, every half hour, which language the adults are using and what the children are doing. The result is usually surprising. Schools that believe they run half the day in English often find that English is concentrated in the most structured moments and that almost all problem-solving, comforting and negotiation happens in Vietnamese. The audit is not a judgement of teachers; it is a picture of where each language really lives, and it gives the team something concrete to adjust at the next planning meeting.
Allocation by activity or content: building a vocabulary for every domain
Activity-based allocation links a language to a kind of activity: for example, cooking and gardening in one language, construction and science exploration in another, with stories alternating. Content-based approaches go further and tie subject areas to languages, which is common in primary bilingual programmes and less common in preschools, where learning is not organised by subjects.
The attraction is depth. If children always explore mixing, pouring and measuring in the kitchen in English, they build a dense, connected vocabulary for that domain, and they hear the same structures repeated in meaningful contexts: "pour it slowly", "is it full yet?", "how many spoons do we need?". Repetition inside a real task is one of the most effective conditions for language learning in young children.
The danger is that each language ends up with a narrow life. If English is only ever the language of structured activities and Vietnamese the language of feelings, rest and friendship, children may conclude that English is for performing and Vietnamese is for living. They may also lack words for kitchen concepts in Vietnamese, which matters when they go home and want to tell a grandparent what they cooked. Activity-based plans should therefore rotate domains over the year, and teachers should consciously bridge key concepts into the other language during reflection times, such as the end-of-day circle.
Allocation by space, and why it rarely stands alone
Space-based allocation ties areas of the room to languages: the book corner might be an English corner, the home corner a Vietnamese corner, or a whole classroom might be designated for one language and a neighbouring room for the other. For young children the idea is attractive because it is concrete. They can see and feel where they are, and some programmes use a small visual cue such as a coloured rug to mark the area.
The trouble is that preschool play does not stay in its corners. Children carry the dolls to the blocks, the blocks to the water tray and the story into the garden. Language follows the play, and an adult who stops a rich conversation because it has crossed an invisible border is choosing the policy over the child. For this reason space-based allocation works best as a light layer on top of another model, for example an English listening area with recorded stories and songs, rather than as the main organising principle.
There is one setting where space allocation makes more sense: when a school runs separate rooms for different language groups for part of the day, such as an English-focused room for small-group play with a specialist. Even then, the session should be connected to the class theme so that children do not experience the space as a separate subject cut off from their day.
Strict separation or flexible use: the current debate
Older bilingual education guidance tended to stress strict separation of languages, on the assumption that mixing would confuse children and reduce exposure to the weaker language. Since the 2000s, research and practice associated with translanguaging, notably the work of Ofelia García and colleagues, has challenged that assumption. It argues that bilingual children draw on one integrated repertoire, that using both languages strategically supports understanding, and that rigid separation can shame children for the way bilinguals naturally speak.
Many practitioners now hold both ideas at once. Protected time and space for each language matters, because the weaker language, usually English in a Vietnamese preschool, needs enough rich input to grow, and constant switching by adults can let the stronger language take over. At the same time, children's own mixing is accepted and often celebrated, and adults are allowed to use the other language deliberately for specific purposes: to check understanding of a new concept, to bring a newcomer into an activity, or to compare how the two languages say something.
The practical upshot for a policy is to distinguish between adult language choices, which are planned, and children's language choices, which are free. Adults follow the allocation model by default and bridge on purpose; children may answer in any language and are never corrected for choosing the "wrong" one.
Writing the school language policy: a checklist
A language policy for a preschool does not need to be long. Two or three pages that every adult reads is better than a binder no one opens. A workable draft covers these points in this order.
- Purpose. One paragraph on why the school is bilingual and what it hopes children will be able to do in each language by the time they leave.
- Children's languages. How the school records each child's home languages at enrolment and how it supports languages other than Vietnamese and English.
- Allocation model. Which model or combination the school uses, described for each age group, with a sample day.
- Adult roles. Who uses which language by default, and when any adult may bridge into another language.
- Children's choices. A clear statement that children may use any language and are never punished or shamed for it.
- Routines and transitions. The agreed language pattern for circle time, meals, rest, hygiene and pick-up.
- Families. How the school communicates with families in their languages and supports home language use.
- Observation and review. How teachers observe language use and when the team reviews whether the policy is working.
Review the policy at least once a year, and after any major change in staffing. A policy written for a classroom with a full-time English-speaking teacher does not survive the reality of a teacher who is present only three mornings a week, and children will feel the gap long before a document notices it.
Câu hỏi thường gặp
Which language allocation model is best for a preschool?
There is no single best model. Person-based allocation is clear for young children, time-based allocation is easy to plan and audit, and activity-based allocation builds deep vocabulary. Most bilingual preschools combine two models and adjust them to their staffing and children.
Is one person, one language still recommended?
It remains a useful default, especially when each adult is clearly stronger in one language. Current practice is more flexible than in the past: adults keep to their language for everyday talk but may bridge on purpose when a child needs comfort or a key concept needs checking.
Should teachers stop children from mixing languages?
No. Mixing is a normal part of bilingual development and often shows that a child is using every resource available. Teachers respond to the meaning, recast naturally in the language of the moment and never punish or shame a child for language choice.
How much English should a bilingual preschool aim for?
Schools set different targets, and hours alone are a poor measure. What matters is that English is used in rich, meaningful interaction across many kinds of activity, not only in short sessions, and that Vietnamese is not weakened in the process.
What if the English-speaking teacher is only in class part of the day?
Then a person-based model alone will limit English exposure. Schools usually add a time or activity pattern that the Vietnamese or bilingual teacher continues, and make sure English is not attached only to one time slot or one type of activity.
Who should write the school language policy?
Ideally the curriculum lead with input from teachers of each language and age group. The policy should be short enough for every adult to read and follow, and it should be reviewed at least once a year against what teachers observe in classrooms.