On the Science of Learning Outside

By Dr. Lillian Cordero

There is something deeply familiar about the way a child’s face lights up when they step beyond the classroom door. The air feels different. The light shifts. Bodies move with an ease that quietly disappears inside four walls. As an educational researcher who has spent two decades studying how environment shapes cognition, I can tell you that this response is not merely sentimental—it is biological, deeply rooted in how our brains evolved to take in information.

Outdoor learning is experiencing a resurgence of interest, and for good reason. The evidence base has grown substantially over the past fifteen years, offering educators and parents a clearer picture of what happens when we move instruction beyond the building. What follows is a careful look at that evidence, translated into practical understanding for anyone who cares about how people learn.

What Happens to Attention Outdoors?

One of the most well-documented effects of outdoor environments is their capacity to restore attention. The Attention Restoration Theory, first proposed by psychologists Rachel and Stephen Kaplan in the late 1980s, suggests that natural settings engage what they called “soft fascination”—a gentle, effortless form of attention that allows directed, effortful attention to recover.

Think of directed attention like a muscle. When you ask a student to focus on a math problem while sitting still, ignoring the whispering of a neighbor and the hum of fluorescent lights, that muscle is working hard. Over time, it fatigues. The Kaplans’ research showed that natural environments—places with trees, water, open sky—allow that fatigued system to recuperate. A 2008 study published in the Journal of Attention Disorders found that children with attention deficits who walked in a park showed substantially improved concentration afterward compared to those who walked in downtown or residential settings.

This does not mean that every outdoor moment is automatically restorative. A noisy playground at recess may not offer the same recovery as a quiet nature trail. But the general principle holds: environments rich in natural features give our cognitive systems a chance to reset.

Stress, Cortisol, and the Learning Brain

Stress is one of the most significant barriers to learning. When cortisol levels remain elevated, the hippocampus—the brain structure central to forming new memories—does its job poorly. Chronic stress narrows attention, impairs working memory, and reduces the cognitive flexibility that learners need to absorb and apply new concepts.

Outdoor learning appears to moderate this. A 2019 systematic review published in International Journal of Environmental Research and Public Health found that nature-based interventions consistently reduced cortisol in school-aged children. It is not that outdoor settings eliminate stressors entirely, but they appear to dampen the physiological stress response enough to make a meaningful difference in what students can absorb.

Consider what this means in practice. A student who arrives at school carrying the weight of a difficult morning may struggle through an indoor lesson, but that same student, given the chance to learn outside—reading under a tree, conducting a science observation by a garden bed—may find their nervous system settling enough to actually engage with the material.

What About Academic Outcomes?

This is the question educators are most often asked: does outdoor learning actually improve achievement? The honest answer is that the research is promising but still developing. A 2016 study from the University of Illinois found that schools implementing regular outdoor instruction saw gains in standardized test scores, particularly in science. Danish research from 2018 showed that students who spent one full day per week learning outside performed as well as or better than their indoor-only peers across multiple subjects.

The mechanism may be indirect. Outdoor learning does not necessarily replace the content of a lesson; instead, it changes the conditions under which the content is encountered. Better attention, lower stress, and more physical movement create a physiological environment where learning becomes more likely.

The Role of Movement

Indoor classrooms constrain movement. This is not a criticism; it is a practical reality of managing groups of young people in limited space. But the human brain did not evolve to learn while seated and still. The cerebellum, long understood as a motor control center, is now recognized as playing a significant role in cognitive processing, working memory, and language.

Outdoor spaces invite a different kind of embodiment. Students can spread out, handle materials, gather data from their surroundings, and simply move their bodies as they think. Research on embodied cognition—the idea that thinking is shaped by physical interaction with the environment—supports this connection. When children measure the circumference of a tree or track shadows across a playground, they are not just adding a fun activity. They are grounding abstract mathematical concepts in physical experience, which makes those concepts more durable.

Social Learning in Open Space

Outdoor environments also shift the social dynamics of learning. Inside a classroom, interaction tends to be teacher-directed: one person speaks, others listen, and the structure is largely vertical. Outside, social structures flatten. Students work in small clusters, negotiate roles more freely, and communicate in ways that feel less performative.

Several studies from Scandinavia—where outdoor “forest schools” have existed since the 1950s—document increases in collaborative behavior, peer negotiation, and pro-social interaction when learning happens outside. Children who are quiet indoors often become more vocal outdoors. Children who dominate indoor discussions sometimes find themselves negotiating more equally in an open environment. The space itself changes who participates and how.

Practical Considerations

None of this evidence matters much if educators and parents feel unable to act on it. The good news is that outdoor learning does not require a pristine wilderness. A schoolyard, a local park, a community garden, even a sidewalk lined with trees can provide meaningful natural exposure. What matters is consistency and intention.

Start small. A single lesson moved outside each week is enough to see changes in student engagement and classroom energy. Prepare for weather—having a plan for light rain or cold shifts outdoor learning from a novelty to a routine. And give students unstructured time alongside the structured lesson. The Kaplans’ research reminds us that restoration happens most reliably when the environment is allowed to work on its own terms.

FAQ

Does outdoor learning work for all age groups?

Yes. While much of the early research focused on early childhood and elementary students, more recent studies have examined adolescents and adult learners. The attention-restoring effects of nature appear to hold across the lifespan. High school students who study outdoors report less mental fatigue, and adults who take walking meetings show improved creative problem-solving compared to those who sit indoors.

What if my school has very limited outdoor space?

Even small patches of green—window boxes, a courtyard, a few trees near the building—offer measurable benefits. Research from the University of Illinois found that views of nature through a window were enough to improve attention in students compared to views of built environments. If your school lacks green space entirely, consider partnerships with nearby parks or community gardens for periodic outdoor sessions.

How do you handle assessment when learning happens outside?

Assessment should align with the learning goals, not the location. If students are observing weather patterns outside, their observations, data logs, and reflections serve the same assessment function as a worksheet completed indoors. Some educators find that outdoor learning actually produces richer artifacts for assessment—field sketches, photo documentation, and real-world data sets that demonstrate deeper understanding than traditional paper exercises.

Looking Forward

The science of learning outside is not new. Educational thinkers from Dewey to Montessori emphasized the importance of environment in shaping how children think and grow. What is new is the specificity of the evidence. We now know, with increasing precision, how natural settings interact with attention, stress, movement, and social dynamics to support the processes that underpin learning.

As educators and parents, we do not need to wait for perfect conditions. A ten-minute walk before a challenging lesson, a reading period moved to the school lawn, a science observation conducted at the edge of the parking lot—these small shifts accumulate. The research suggests that every bit of outdoor exposure counts, and that consistency matters more than perfection.

The children who light up when they step outside are not just enjoying a break. Their brains are responding to an environment that supports how they were built to learn. We would do well to listen to that response and build our practice around it.