Research & Practice Series · Journal 2 of 4 · 20 July 2026

Belonging in Its Many Shades

By Nichola de Montaigne

Nichola de Montaigne · Belonging in Its Many Shades

“Where are you from?”

It should be a simple question. My usual answer is: “How long do you have?”

I was born in Saudi Arabia, raised in Portugal and grew up with British heritage and English as my first language. Portugal was home - a minha terra - yet when I went to boarding school, I soon began to realise, I was not really English either. Back in Portugal, language sometimes marked me as not being entirely Portuguese either.

For a long time, I did not know how to answer that question without editing parts of myself to make the answer easier for someone else to understand.

If you have ever read Third Culture Kids, you may recognise this experience. If you have not, perhaps you should. It gives language to the lives of children who grow up across cultures: belonging everywhere in fragments, yet sometimes feeling fully claimed by nowhere.

My sense of belonging shifted depending on where I stood, who was asking and which part of my story they were prepared to recognise. Eventually, I understood that belonging did not require me to choose one part of myself over another. Identity can hold many places, languages, histories and relationships at once.

*Belonging has many shades.*

What the research tells us

The term Third Culture Kid describes a child who spends a significant part of their developmental years outside their parents’ culture or country of nationality. These children often build an identity from several cultural worlds rather than inheriting one uncomplicated sense of home.

That experience can bring considerable strengths: adaptability, cultural sensitivity, linguistic flexibility and the ability to see a situation from more than one perspective. International mobility can also involve repeated losses - of friendships, familiar places, routines, languages and the feeling of being immediately understood. Research repeatedly identifies identity, belonging and sustained relationships as important areas of adjustment for internationally mobile children.

The important distinction is not whether a child belongs to more than one culture. It is whether they feel permitted to integrate those cultures into a coherent sense of self.

Research into multicultural identity suggests that wellbeing is stronger when people can experience their different cultural identities as compatible parts of themselves. When those identities remain compartmentalised - or when the person feels required to choose one while concealing another - their sense of self may become less stable. For Third Culture Kids, identity integration has been associated with greater self-concept consistency and self-efficacy.

Belonging begins with a person

We like to design belonging as an environment: the campus, the colours on the wall, the photograph on the prospectus. It matters, and I have spent years caring about it. But the research points somewhere narrower and more demanding than a building.

Across decades of resilience studies one finding recurs so often that it has become a working definition of the field. The Center on the Developing Child at Harvard University puts it plainly: the single most common factor for children who end up doing well is the support of at least one stable and committed relationship with a parent, caregiver or other adult. Not a curriculum. Not a campus. A person who stays.

Inside school, the same pattern shows up in the numbers. A meta-analysis of 99 studies involving more than 88,000 students found that the affective quality of the teacher-student relationship was associated with school engagement at medium to large effect sizes, and with achievement at smaller but consistent levels. Children do not ask first whether a place is excellent. They ask, usually without words, whether anyone in it knows them.

That person is also the first thing to disappear when life becomes hard. In a Welsh national survey of 2,497 adults, 86.6 per cent of those with no adverse childhood experiences reported always having a trusted adult available. Among those with four or more, only 44.4 per cent did. Adversity narrows the circle of people who show up. For an internationally mobile child, that circle is already being thinned by the moves themselves.

One person also seems to matter for longer than one school year. In a longitudinal study of around 2,000 young people followed across two decades, at least one positive, committed adult-child relationship was associated with lower depression, anxiety and perceived stress in adulthood, regardless of the adversities those young people had carried. A separate Australian cohort of 1,568 adults found that belonging at school at fifteen or sixteen was associated with fewer symptoms of depression, anxiety and stress at nineteen, at twenty-four and again at twenty-eight. Belonging is not a mood that expires at the end of Year 11.

What it costs when a child does not belong

This is where the personal and the public meet, and it is the part I have watched most closely across the generations I have worked with.

In the OECD's most recent large-scale assessment, an average of 74.6 per cent of 15-year-olds agreed that they belong at their school. Roughly one in four did not.

The economic evidence is blunt about what tends to follow. In a London longitudinal study followed to age 28, children who had shown conduct disorder at ten had used around 70,000 pounds of public services by adulthood, against roughly 7,400 pounds for children who had shown no such problems - ten times the cost, with crime, additional educational provision and foster or residential care accounting for most of it. A meta-analysis across 28 European countries found that costs attributable to adverse childhood experiences exceeded one per cent of national GDP in every country studied, with a median of 2.6 per cent. The synthesis behind those estimates placed the annual cost for North America and the European Region at US$1.3 trillion. Loneliness and social isolation, measured separately, cost societies between US$2 billion and US$25.2 billion each year, while programmes that rebuild connection have been found to return between US$2.28 and US$13.72 for every dollar spent.

I have watched these numbers arrive one child at a time. A teenager who had passed through four schools and could not name a single adult who would notice if he disappeared. A boy whose intelligence was only ever discussed as a behaviour problem. A family that left because nobody ever made the accompanying parent feel that the school belonged to them too. The invoices are real, and so are the children they describe.

If I am honest about why I keep returning to this, it is because belonging is the part of education that decides whether everything else lands. A child who belongs will take a risk in a language that is not their first, ask for help before a gap becomes shame, and stay curious when a task stops being easy. That is the mission in its simplest form: that no child in our care should have to become smaller, quieter or less complicated in order to be held by a community.

When the child belongs, the adult is in the picture too

It is tempting to treat the child as the only client of a school. Mobile families know otherwise.

Global mobility research has said this for years. A 2010 survey by Brookfield Global Relocation Services found an international assignment failure rate of around 6 per cent, with 65 per cent of those failures attributed to a spouse or partner dissatisfied with the new location. The Permits Foundation found that 82 per cent of accompanying partners held a university degree, that 90 per cent had given up their own job to make the move, and that only 35 per cent worked at all during the posting. A field study of 238 expatriate spouses found that those whose own employment was severely disrupted or ended adjusted significantly less well socially than those who kept it.

Read plainly, this describes the adult who walks a child to the gate. They have usually traded their own profession, language and friends for someone else's opportunity, and are now expected to build a life in a country where no one knows them yet. A parent who does not belong cannot easily hand a child the confidence to belong. The adult needs a person too.

Belonging is not a nationality

Belonging is often reduced to geography: the place on a passport, the country named as home or the language assumed to prove membership. But identity is formed through relationships, memories, rituals, losses, cultural expectations and the places in which a person has learned to feel safe.

For an internationally mobile child, home may be plural. One language may hold family intimacy, another education, another friendship, humour or grief. A place left years ago may remain emotionally present, while the place named as home may sometimes make the child explain why they belong there.

This is not confusion that adults must resolve by choosing the most convenient label. It is complexity that a child can learn to understand and integrate.

What this means for ISI Cascais

Welcoming a child is not simply celebrating their nationality during an international day. It means remaining curious about the languages, relationships, transitions and experiences through which that child understands themselves. A child should not have to simplify their identity to make it easier for a community to accept them.

At ISI Cascais, belonging is therefore not a programme added beside academic learning. It shapes how adults listen, how curriculum is designed and how the community responds to difference. Through the PPPP Compass of Purpose, People, Place and Practice, we ask:

  • Purpose. Does this learner see their identity, interests and
  • possible contribution reflected in their education?
    • People. Who knows this child well enough to recognise what they
    • carry between cultures, languages and generations?
      • Place. Does the environment communicate that different histories
      • and ways of being are genuinely welcome here?
        • Practice. Do our teaching, language and routines invite
        • curiosity about difference rather than demand conformity?

        This is complemented by the WEITS pillars of Wellbeing, Entrepreneurship, Innovation, Technology and Sustainability, which give learners different ways to express who they are and translate identity into participation and contribution.

        From evidence to experience

        The first article in this series examined what the data tells us about belonging: children learn, participate and recover more effectively when they feel safe, recognised and connected. OECD findings similarly associate school safety and freedom from bullying with stronger belonging, greater confidence in self-directed learning, higher life satisfaction and lower anxiety.

        This second article moves from the evidence into the child’s lived experience.

        Belonging is not sameness. It is not the absence of difference, and it is not successful conformity. It is the experience of knowing that every part of your story can enter the room with you.

        At ISI Cascais, we do not ask children to choose between identities or quietly edit themselves to fit an established norm. We help them understand the many shades of their own identity while becoming genuinely curious about the identities of others.

        But this leads us to a more difficult question. What happens when a child repeatedly receives the opposite message - when they are not recognised, cannot find their place and become known primarily through the behaviour adults want to stop?

        That is where the next article begins: not with the offence, the disruption or the rebellion, but with everything that came before it.

        Sources

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        Dewaele JM, van Oudenhoven JP. Multicultural identity integration versus compartmentalization as predictors of subjective well-being for Third Culture Kids. International Journal of Environmental Research and Public Health. 2023;20(5):3880. https://pmc.ncbi.nlm.nih.gov/articles/PMC10002138/

        Filipic Sterle M, Fontaine JRJ, De Mol J, Verhofstadt LL. Expatriate family adjustment: an overview of empirical evidence on challenges and resources. Frontiers in Psychology. 2018;9:1207. https://pmc.ncbi.nlm.nih.gov/articles/PMC6064735/

        OECD. PISA 2022 Results Volume II Learning During and From Disruption. 2023. https://www.oecd.org/en/publications/pisa-2022-results-volume-ii_a97db61c-en.html

        National Scientific Council on the Developing Child. Supportive relationships and active skill-building strengthen the foundations of resilience: Working Paper No. 13. 2015. https://developingchild.harvard.edu/resources/working-paper/supportive-relationships-and-active-skill-building-strengthen-the-foundations-of-resilience/

        Rogoff B. Side by side: Learning by observing and pitching in. Ethos. 2003;31(1):1-23. https://doi.org/10.1111/j.1548-1352.2003.00001.x

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        How we measure our success

        Academic excellence.
        Never compromised.

        We can only learn when we are willing to take risks, and we can only take risks when we feel confident and known. That is why belonging and rigour are not opposites at ISI. Academic excellence is a key driving indicator of how we measure our success as a community.

        Curiosity is what we light first. Our unique PPPP™ compass, Purpose, People, Place and Practice, is how we keep learning relevant, meaningful, significant and challenging for every child, so rigour is felt as wonder, and challenge becomes something children learn to meet with growing skill, stamina and confidence.

        01

        Rigour, never compromised

        High expectations in literacy, numeracy and conceptual understanding for every child, assessed against international IB-aligned standards and tracked with evidence over time.

        02

        Strengths first

        We begin with what a child can already do. Strengths-based teaching is linked to higher engagement, persistence and achievement, so we build from strength towards stretch.

        03

        Courage to take risks

        Learning happens at the edge of what we know. Children who feel safe to be wrong attempt harder problems, and mistakes become information, not judgement.

        04

        Confident lifelong learners

        Self-efficacy is one of the strongest predictors of achievement. We measure growth in what each child can do, and in how confidently they choose to keep learning.

        Research · Bandura on self-efficacy · Hattie, Visible Learning · Seligman & positive education on strengths-based practice · Dweck on learning from mistakes

        Our Mission

        When the Child Belongs, the Community Thrives.

        Three commitments

        Three commitments that bring ISI Cascais and DeMontaigne Life Design together.

        “We hold one standard above all others: that every child belongs, deeply, visibly, and before anything else is asked of them. Three studios, flexible ages, one question that guides every decision: does this genuinely serve the child, the family, and the wider community, over time?”

        In partnership with DeMontaigne Life Design ↗