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Sustainability-oriented effects of a longitudinal multicomponent school-garden intervention on food literacy, dietary diversity, and household educational transfer in rural schools

This study demonstrates that a 12-month multicomponent school-garden intervention significantly improved food literacy, dietary diversity, and household educational transfer among rural primary school students, highlighting the critical role of experiential learning and family reinforcement in achieving sustainable educational outcomes.

Original authors: Dionicio López Basilio, Histler Juan Castillo Paredes, Teófilo Félix Valentín Melgarejo, Javier Raúl Minaya Lovaton, Wilfredo Florencio Rojas Rivera, Josué Chacón Leandro, David Wilson Osorio Espinoza

Published 2026-07-01

📖 4 min read☕ Coffee break read

CC BY 4.0

Original authors: Dionicio López Basilio, Histler Juan Castillo Paredes, Teófilo Félix Valentín Melgarejo, Javier Raúl Minaya Lovaton, Wilfredo Florencio Rojas Rivera, Josué Chacón Leandro, David Wilson Osorio Espinoza, Lury Tatiana Quispealaya Arenas, Clodoaldo Ramos Pando, Armando Elías Zenteno Quinto, Raúl Malpartida Lovatón, Ramón Ángel Robles Huaynate, Elizabeth Clara Cordova Zevallos, José Rovino Alvarez Lopez, Flaviano Armando Zenteno Ruíz

Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). ✨ This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer

Imagine a group of schools in the high, rural mountains of Peru as a collection of small, quiet gardens. For a long time, the children in these schools knew very little about how to choose healthy food or why it mattered. They were like travelers without a map, navigating a world where nutritious food was hard to find and even harder to understand.

To help them, researchers launched a 12-month "School Garden Adventure." Think of this not just as a class, but as a living, breathing ecosystem where learning happened in three different places at once: the classroom, the dirt under their fingernails, and the kitchen table at home.

Here is how the adventure unfolded and what it achieved, broken down into simple stories:

The Recipe for Change

The researchers didn't just hand out textbooks. They built a "multicomponent" program, which is like a recipe with five essential ingredients:

Classroom Lessons: Weekly talks about what food is and why it matters.
The Garden: Twice-weekly hands-on time planting, watering, and harvesting vegetables like lettuce, carrots, and tomatoes.
Cooking Workshops: Monthly sessions where kids turned those raw vegetables into healthy meals.
The Home Connection: Monthly "homework" that wasn't boring worksheets, but fun activities designed to get parents involved, turning the school lessons into family habits.
Teacher Support: Teachers were given a map and a compass to make sure the adventure stayed on track.

The Journey: From "Lost" to "Found"

The researchers checked in on the students five times over the year, like checking the progress of a growing plant.

The "Food Literacy" Score: Imagine "food literacy" as a flashlight. At the start, only 17% of the students had a bright, powerful flashlight (high literacy). By the end of the year, 66% were holding bright flashlights, while the number of students with dim or broken flashlights dropped from 37% to just 6%. The kids didn't just learn facts; they learned how to make smart choices.
The "Dietary Diversity" Plate: Think of a child's plate as a mosaic. At the beginning, the mosaics were made of very few colors (limited food types). By the end, the mosaics were bursting with vibrant colors and patterns. The kids were eating a much wider variety of healthy foods.

The Secret Sauce: Why It Worked

The study found that the magic didn't happen in a vacuum. It was like a three-legged stool; if one leg was weak, the stool would wobble. The three legs were:

Student Engagement: The kids had to want to be there and participate.
Family Transfer: The kids had to take what they learned home and share it with their parents.
Teacher Support: The teachers had to keep the garden and lessons running smoothly.

When all three legs were strong, the results were explosive. The study showed that when kids were engaged and their families were involved, the learning didn't just stick for a week; it became part of who they were.

The Ripple Effect

One of the most interesting findings was how the knowledge spread. It wasn't just a straight line from teacher to student. It was like dropping a stone in a pond.

The Ripple: The knowledge started in the school garden, rippled out to the student's home, and then spread to the wider community.
The Synchronization: Over time, the students' learning and their eating habits started to move in perfect rhythm, like a choir finding their harmony. The study used complex math to show that as the year went on, the connection between "knowing about food" and "eating good food" became stronger and more stable.

The Bottom Line

This paper claims that when you combine growing food, cooking it, teaching it, and sharing it with families, you create a powerful engine for change.

The study concludes that this type of school garden isn't just a fun activity; it is a sustainability engine. It didn't just teach kids to eat better for a month; it helped them build a lasting habit that they could carry with them, share with their families, and keep growing long after the 12 months were over. The "map" the children received wasn't just for the school; it was for their entire lives.

Technical Summary: Sustainability-Oriented Effects of a Longitudinal Multicomponent School-Garden Intervention

Problem Statement
Rural and economically marginal communities, particularly in the Andean region, face persistent food and nutritional insecurity among children. This challenge is exacerbated by limited dietary diversity, inadequate nutrition knowledge, and insufficient access to practical, experiential nutrition education. While school-based interventions are recognized as strategic tools for promoting food literacy and sustainability, existing literature suffers from significant limitations:

Temporal Constraints: Most studies rely on short-term pretest–posttest designs, failing to assess the long-term stability of educational and dietary outcomes.
Scope Limitations: Interventions often focus on single outcomes (e.g., vegetable consumption) rather than broader sustainability-oriented dimensions such as household transfer, implementation diffusion, and adaptive responses.
Analytical Gaps: Research frequently utilizes traditional statistical comparisons that do not capture the dynamic, multilevel interactions among educational, behavioral, and sustainability outcomes over time.
Contextual Deficits: There is a lack of investigation into how school-based learning transfers to household environments, a critical factor for sustaining behavioral change in rural settings.

Methodology
The study employed a 12-month longitudinal, multicomponent school-garden intervention across 12 rural primary schools in the Pasco Region of Peru (elevations 3,400–4,200m). The study involved 1,220 students (aged 8–12 years) at baseline, with follow-up assessments at 3, 6, 9, and 12 months (T0–T4).

Intervention Components: The program integrated five core elements:
1. Weekly food literacy education sessions (45 mins).
2. Bi-weekly educational garden activities (60 mins), including planting, composting, and harvesting.
3. Bi-monthly cooking and nutrition workshops (90 mins).
4. Monthly family-transfer activities (take-home materials and discussion tasks).
5. Continuous teacher support and fidelity monitoring.
Outcome Measures: Primary outcomes included food literacy (25-item questionnaire, 0–100 scale) and dietary diversity (12-item checklist). Secondary outcomes included student engagement, family-transfer practices, nutrition knowledge, school connectedness, and sustainability indicators.
Analytical Framework: The study utilized a sophisticated, multilevel analytical approach moving beyond traditional descriptive statistics:
- Longitudinal Modeling: Bayesian ridgeline density analysis, raincloud plots, and alluvial transition analysis to track score redistribution and category shifts.
- Multivariate & Predictive Analysis: UMAP ordination, PERMANOVA, SHAP (SHapley Additive exPlanations) contribution analysis from gradient-boosted models, and Bayesian forecasting with weakly informative priors.
- Temporal & Network Analysis: Wavelet coherence analysis for synchronization, functional principal component analysis (FPCA), and dynamic network trajectory analysis.
- Spatial & Sustainability Analysis: Diffusion-flow network analysis, efficiency frontier analysis, and Moran's I spatial autocorrelation.

Key Results
The intervention produced significant, sustained improvements across all measured domains:

Food Literacy & Dietary Diversity: Mean food literacy scores increased from 42.1 (baseline) to 72.9 (12 months). The proportion of students in the "high" literacy category rose from 17% to 66%, while the "low" category dropped from 37% to 6%. Dietary diversity trajectories showed continuous improvement with progressive stabilization.
Transition & Retention: Alluvial transition analysis confirmed a stable upward educational progression. Student engagement and family-transfer practices were identified as the strongest predictors of learning retention and literacy improvement (SHAP analysis).
Multivariate Restructuring: PERMANOVA indicated significant restructuring of nutritional-learning profiles ( $F=18.47, p<0.001$ ), explaining 15.6% of total variance. Food literacy, dietary diversity, and engagement were found to be interconnected components of a single adaptive system rather than isolated outcomes.
Temporal Synchronization: Wavelet coherence analysis revealed strong temporal synchronization between food literacy and dietary diversity, particularly between months 4 and 10 ( $r^2 = 0.63$ ), indicating coordinated evolution of knowledge and behavior.
Diffusion & Sustainability: Multilayer diffusion analysis demonstrated the propagation of practices from schools to households and communities (diffusion index: 0.78). The intervention achieved an overall sustainability index of 0.76/1.00, with high scores in nutritional (0.81) and educational (0.78) domains.
Implementation: Fidelity remained high (0.79–0.96) across schools. Efficiency frontier analysis suggested diminishing marginal returns at very high implementation intensities, indicating an optimal range for intervention dose.

Significance and Claims
The authors claim that this study addresses critical gaps in the literature by demonstrating that multicomponent school-garden interventions function as effective sustainability-oriented educational systems.

Holistic Impact: The study provides evidence that such interventions can simultaneously improve food literacy, dietary diversity, learning retention, and household educational transfer, rather than just short-term knowledge gains.
Mechanism of Action: The findings suggest that the integration of experiential learning, family reinforcement, and teacher support is critical for promoting long-term educational sustainability in rural environments.
Methodological Contribution: By employing longitudinal, multivariate, predictive, and temporal synchronization methodologies, the study offers a more robust framework for evaluating the dynamic adaptation of educational and behavioral responses compared to traditional pretest–posttest designs.
Scalability: The consistency of implementation and the positive diffusion of practices across school and household layers suggest the model is scalable and capable of fostering community resilience and food-system adaptation.

The paper concludes that these interventions align with Sustainable Development Goals (SDGs 2, 3, 4, and 11) and represent a viable strategy for transforming education and behavior in the context of food security and sustainability in vulnerable rural populations.