Most parents picture preschool as a safe place for a child to spend the day. The science tells a different story. The years before age five are when the brain builds the architecture that shapes language, thinking, and emotion for life. Here is what decades of research show, and what it means for the choice you make now.
Key takeaways
- The earliest years matter most. Roughly 80% of brain development happens in the first 1,000 days of life (University of Minnesota).
- Quality decides the outcome. Higher-quality early education is linked to stronger cognitive and social-emotional development, while low-quality programs can hold children back (von Suchodoletz et al., 2023; Auger et al., 2014).
- Self-regulation is a lifelong skill, and it is built early. A Canadian trial of the Tools of the Mind curriculum improved executive function, with the clearest gains for children who started with more difficulty (Solomon et al., 2018).
- Early investment pays lasting dividends. Children in high-quality early programs show better academic, economic, and health outcomes in adulthood (Abecedarian Project).
- Bilingualism is an asset, not a delay. Growing up with two languages does not slow language milestones (Journal of Child Language, 2024).
Preschool is not a waiting room. It is the foundation.
What decades of Canadian research tell us about the most important years of your child’s life, and what you can do about it
For too long, preschool has been seen through a narrow, transactional lens: a safe place where children spend their days while parents work. It’s a perception that is not just outdated. According to a growing body of scientific evidence, it is fundamentally mistaken. Preschool is one of the most consequential educational investments a child will ever receive. The years between birth and age five represent a period of neurological development so intense, so formative, that what happens during them can echo across an entire lifetime.
The science is clear: the early years are critical
Research from the University of Minnesota shows that roughly 80% of a child’s brain development occurs within the first 1,000 days of life. By the time a child enters kindergarten, much of the brain’s foundational architecture is already forming: its neural pathways and its capacity for language, memory, and emotional intelligence. This does not mean the story is fixed. The brain remains remarkably plastic well beyond age five. But these early years shape the ground on which later learning is built. This is not a philosophical argument. It is neuroscience, and it has real implications for how we think about the preschool years.
What Canadian research tells us
Canada’s education system consistently ranks among the best in the world, and the country’s researchers have been at the forefront of early childhood studies for decades. What they have found reframes the debate.
A large international meta-analysis of early childhood studies found that program quality is linked to children’s cognitive and social-emotional development (von Suchodoletz et al., 2023). The measured effects are often modest, but they point in a consistent direction: higher-quality settings support better outcomes, and low-quality ones can hold children back (Auger et al., 2014).
The preschool years build self-regulation, a lifelong skill
A Canadian cluster-randomized controlled trial tested the Tools of the Mind curriculum, which targets self-regulation, against another play-based program. Children in the Tools group made greater gains on a behavioral measure of executive function, though the effect was modest and clearest for children who began with greater difficulties in attention and activity level (Solomon et al., 2018, Frontiers in Psychology). The prefrontal cortex, the brain’s seat of executive function, develops rapidly in early childhood, though it continues to mature well into early adulthood.
Early investment produces lasting dividends
Long-term studies point to lasting dividends. The Abecedarian Project, a landmark study in the United States that followed children from infancy, found that participants who received high-quality early education went on to show better academic outcomes, higher earning potential, and stronger health in adulthood. The Abecedarian Approach that grew out of that research is now used internationally, including in Canadian provinces such as Manitoba. Across this body of work, high-quality early education tends to show returns that exceed what the same investment achieves later in a child’s education.
In a rapidly changing world, bilingualism is more than a bonus
We live in an era of accelerating change: technological, economic, and cultural. The children entering preschool today will graduate into a world that looks very different from the one we know. One of the most valuable capacities we can help them build is cognitive flexibility: the ability to adapt, process complexity, and think across frameworks. A growing body of research suggests that bilingualism may help support it.
The evidence here is genuinely debated. Some studies report advantages for bilingual children on tasks measuring working memory, attention, and cognitive flexibility. Others, including several systematic reviews and meta-analyses, find the effect is small, inconsistent, or dependent on how it is measured (Lehtonen et al., 2018; Gunnerud et al., 2020). Taken together, the research points to a plausible benefit rather than a settled certainty. What is clearer is that growing up with two languages is not a disadvantage.
The window for language learning opens early
Between birth and age six, children’s brains are especially receptive to language acquisition. Research on early brain development, including work from ZERO TO THREE and Harvard’s Center on the Developing Child, shows how rapidly the foundations for language form in these years. Studies tracking developmental milestones indicate that growing up with two languages does not, in itself, delay language development: bilingual toddlers typically reach milestones such as first words, vocabulary growth, and sentence formation on a timeline comparable to their monolingual peers.
Bilingualism shapes the brain
Neuroimaging studies find structural and functional differences in the brains of bilingual people, particularly in the networks that support language processing and cognitive control. This is not only about language. These are systems that underpin reasoning, problem solving, and communication across many areas of life.
Preschool, understood properly, is not simply preparation for school. In a real sense, it is school. It is where some of the most fundamental neural architecture is built, the architecture that will shape many later learning experiences.
The question is not whether to invest in this period. The question is how, and with whom.
At Maple Bear, the science becomes the standard
Maple Bear Global Schools was built on exactly this premise: that preschool is not daycare, that bilingual education is not optional, and that Canadian pedagogical excellence is a gift every child in the world deserves access to.
Founded in Canada and now operating in more than 39 countries across 5 continents, Maple Bear delivers a student-focused early childhood program that puts the latest research into daily practice. The curriculum is written by a distinguished faculty of over 150 Canadian educators and is continuously updated to reflect the most current findings in developmental science.
At the preschool level, Maple Bear delivers an English immersion learning system grounded in Canadian best practices. At elementary and beyond, that bilingual foundation continues to grow, ensuring children can pursue their studies anywhere in the world.
This is what it looks like when science, care, and ambition come together. Not a place where children wait. A place where they begin.
This article was originally published in June 2026 on the Maple Bear CEE blog at www.maplebear-cee.com.