Our Recommendation
Healthy Learners has identified a real gap that almost nobody was working on: school-aged children have the fewest touch points with the health system of any age group, because global health funding concentrates on the under-fives, and yet nearly half of sub-Saharan Africa's population is under fifteen. It then built a model that puts care where the children already are, and it tested that model properly.
A prospective matched-control study, published in PLOS ONE by researchers at Harvard, Berkeley, and the Swiss Tropical and Public Health Institute, compared seven intervention schools against seven matched controls and found the adjusted odds of self-reported acute illness down 38 percent and the adjusted odds of stunting down 52 percent. Illness and stunting are ultimate outcomes under this framework, measured against a comparison group, alongside intermediary gains in healthcare access, supplementation coverage, and health knowledge.
The model was designed from the start to run inside government structures using existing teachers and existing clinics, at an ongoing cost of $1.50 per child per year, which is one percent of what Zambia spends on educating a primary school child, and which the organization calculates is a fifth of what building parallel structures would cost. Zambia has adopted the model as national policy through its School Health and Nutrition Guidelines.
Healthy Learners' Fierce Certification score is 100/100 points based on our criteria:
✔ Has Ultimate Outcome Goals (20 pts)
✔ Measures Intermediate Outcomes (15 pts)
✔ Measures Ultimate Outcomes (20 pts)
✔ Measures Intermediate and/or Ultimate Counterfactual (20 pts)
✔ Shows Continual Learning & Adaptation (25 pts)
The Social Problem
Zambia enrolls more than 90 percent of its children in primary school, yet 39 percent fail to complete it (Education Policy Data Center, cited in Wei et al. 2019). Among the Lusaka schoolchildren in that study, 42 percent reported a cough with chest pain and 35 percent a fever in the preceding two weeks, 24 percent reported worms in their stool, and 15 percent were stunted.
The organization's diagnosis of why is structural rather than clinical, and it is the most distinctive part of its case. Healthcare in Zambia is free at the point of use. The problem is not price. It is that school-aged children have the fewest touch points with the health system of any age group, and that global health programming for this age band is thin: program after program targets children under five, and the health needs of older children go critically overlooked. With nearly half of sub-Saharan Africa's population under fifteen, that is a very large blind spot.
At the school level the failure is concrete. Nobody in the building is trained to assess a sick child. There is nowhere for that child to go. There is no pathway from classroom to clinic and no follow-up after a referral. So when a learner falls ill, the school's only available response is to send them home, which removes the child from both care and education at once.
The consequences are illness carried untreated, stunting that limits physical and cognitive development, endemic parasitic infection, missed school, complications from conditions that would have been minor if caught early, and outbreaks that spread through school populations before anyone at district or national level knows.
The Solution
Make the school the front door to the health system, staffed by the teachers who are already there.
A ten-step model (The Model), built explicitly to run inside government infrastructure rather than beside it. Select teachers are trained and equipped as School Health Workers who monitor student health, assess unwell children, deliver basic care from a first-aid kit, and refer the rest. Health rooms are established at partner schools, with Healthy Learners providing seed funding, design assistance, and oversight while the schools themselves build and maintain them.
Proactive detection, three ways. A student buddy system in which children are responsible for noticing when a classmate is unwell. Classroom teachers watching for children who appear sick. And daily attendance review with follow-up on absent students, which turns the register into a case-finding tool.
A clinical decision support application, built with THINKMD, that mirrors physician logic so a trained teacher can triage and treat mild conditions and escalate serious ones. Because the School Health Worker has already assessed and triaged, the receiving health facility fast-tracks the child. If no guardian can transport a child needing urgent care, the School Health Worker does.
Continuous care. Follow-up after the initial assessment until the child is deemed healthy and back in school.
Preventive and educational layers. Biannual deworming and vitamin A, organized immunization, and designated health education time in the school schedule, with topics tailored to the disease trends the program's own data reveal.
The economics are the scaling strategy. In the pilot year, the full program cost $5.10 per child including teacher training and equipment, falling to $2.10 per child recurrent (Wei et al. 2019). At current national scale Healthy Learners reports about $1.50 per child per year, one percent of Zambia's per-child primary education expenditure.
Mapped against a Theory of Change, every component maps to a named failure, and the chain was tested end to end: detection, treatment, coverage, knowledge, then morbidity and stunting.
Key Outputs
From the organization's own reporting:
- 1.4 million students served across 1,070 government schools with 8,500 School Health Workers
- $1.50 per child per year ongoing cost, against $10 to $15 per child in setup
- In 2024 alone: 203,471 learners presenting at school health rooms, classified with 319,395 conditions, across 503 schools in 17 districts and five provinces
From outside sources at earlier points in the growth curve: 250,000 children and all public primary schools in Lusaka (2021), 280,000 across three districts (2021), 830,000 to 980,000 students across 598 schools with 4,000 to 5,300 trained teachers (2025). Stated goal of 2.2 million students by 2028.
Institutional position:
- Model adopted as Zambian national policy through the School Health and Nutrition Guidelines
- 2022 memorandum of understanding between the Ministries of Health and Education to scale nationally
- Contracted by the United States Centers for Disease Control and Prevention and the Ministry of Health to transform schools into syndromic surveillance hubs
- Two peer-reviewed publications, in PLOS ONE (2019) and a 2026 surveillance analysis
- Scaling strategy documented publicly in a Spring Impact case study
Key Intermediate Outcomes
Three intermediary outcomes carry counterfactual estimates from the matched-control study, and all three sit on the causal path the model depends on.
Preventive coverage. The intervention raised deworming coverage by 48 percentage points and vitamin A supplementation by 47 percentage points. Among intervention students, the share not receiving vitamin A in the previous six months fell from 57 percent to 14 percent, while the control group showed no improvement. This is the measure most school health programs report as their headline, and here it is a middle link rather than the endpoint.
Health knowledge. Student health knowledge rose by 0.53 standard deviations (95 percent confidence interval 0.24 to 0.81). That is a large effect by the standards of education and health interventions, where 0.2 is typically called small and 0.5 moderate to large.
Access, utilization, and trust. The study found improved access to and utilization of healthcare and increased student trust in their teachers and the local health facility. Trust matters operationally in this model, because a child who does not trust the health room does not walk into it.
Service volume that is itself a finding. In 2024, School Health Workers classified 319,395 conditions in 203,471 learners across 503 schools. The 2026 peer-reviewed analysis of that data characterized the burden and spatial distribution of health conditions in Zambia's school-aged population, including the concentration of malaria and febrile illness in Mansa, Mwense, and Kasama. The findings support scale-up of the school health model in Zambia and other low-resource settings. That is a program generating national epidemiological knowledge as a byproduct of delivering care.
Key Ultimate Outcomes
Two ultimate outcomes were measured against a matched control group.
The study design: a prospective matched control study, 12 classes in seven intervention schools and 12 classes in seven matched control schools, all within the Chipata sub-district zone of Lusaka. 380 students aged 4 to 16 enrolled in 2015, with 97 percent followed to endline in 2016. Grades in control schools were matched to those in intervention schools. Multivariable linear and logistic regression.
The primary outcome is what children said about their own health, not what a clinician measured. Height and weight were measured directly by study staff; illness was not. The authors flag recall and social desirability bias as their first limitation and note the concern is heightened by the young age of the sample.
Acute illness morbidity, the primary outcome: adjusted odds of self-reported acute illness down 38 percent (adjusted odds ratio 0.62, 95 percent confidence interval 0.48 to 0.77), measured by asking students about fourteen illnesses in the preceding two weeks.
Stunting: adjusted odds of being stunted down 52 percent (adjusted odds ratio 0.48, 95 percent confidence interval 0.26 to 0.87). The effect sits in non-severe stunting, which fell 5.71 percentage points among intervention students while rising 3.5 points in controls. Severe stunting declined in both groups by similar amounts, so the program cannot be credited with that part.
The authors qualify this finding themselves. Stunting is a threshold measure: a child counts as stunted below -2 standard deviations on height-for-age and not above it. At baseline, 45.2 percent of students in this sample sat between -1 and -3 standard deviations, clustered close enough to that line that small differences in growth move a large number of children across it. The 52 percent reduction is real and it is measured against a control group. It is also, as the research team notes, partly a function of where the cutoff falls.
Four outcomes showed no effect. Weight (adjusted mean difference 0.17, 95 percent confidence interval -1.11 to 1.44), overweight (adjusted odds ratio 0.54, 0.23 to 1.30), thinness (adjusted odds ratio 1.03, 0.27 to 3.94), and student absenteeism (adjusted odds ratio 0.89, 0.60 to 1.33). The first three sit alongside the stunting result, which means the program moved height-for-age without moving weight-for-height in either direction. Absenteeism is the more consequential null, because keeping sick children in school is half of what the model is for. Healthy Learners reports decreased absenteeism across partner schools in its own operational data, which has no comparison group. The trial, which had one, did not find it.
Schistosomiasis fell 60 percent in Ng'ombe Township. That figure has no comparison area and should be read as a strong local signal rather than an attributable effect.
Teachers' empowerment is measured qualitatively: School Health Workers report increased social status and a sense of empowerment extending to all aspects of their role. Empowerment is an ultimate outcome in this framework, and this is a secondary population the model was not designed to benefit.
Continual Learning & Adaptation
It commissioned independent evaluation early and before scaling. The matched-control study ran in 2015 and 2016, when the program was small, conducted by academics at Harvard, Berkeley, and the Swiss Tropical and Public Health Institute, with Institutional Review Board approval in both the United States and Zambia, and published in a peer-reviewed open-access journal. Spring Impact's case study identifies this as the first of four factors behind the organization's successful government partnership: they proved impact through academic partnerships before asking government to adopt the model.
The study is checkable by anyone. The trial was registered on ClinicalTrials.gov as NCT03607084, and the published paper carries its study protocol, a TREND reporting checklist, and the complete baseline and endline dataset as supporting information. Registration means the outcomes were specified before the data came in, so the absenteeism null was a question the researchers committed to answering rather than an analysis they chose to report. The published dataset means a skeptical reader can rerun the regressions.
Measurement is built into service delivery, not bolted on. The clinical decision support system captures every assessment, which means the program's monitoring data and its epidemiological output are the same dataset. The organization states plainly what it does with it: monitor disease trends across the school network, detect potential outbreaks early, and customize program content and health education topics to local community needs. That is a stated feedback loop running from data to curriculum.
It published a second peer-reviewed paper analyzing its own operational data. The 2026 surveillance analysis covering 503 schools, 17 districts, and five provinces turned a year of routine service records into the first characterization of the health burden of Zambia's school-aged population, which is a contribution to the field well beyond the organization's own accountability.
The model was designed for handover from the start, and the handover happened. Working inside existing school and clinic infrastructure rather than duplicating it, with schools themselves building and maintaining health rooms. Zambia adopted the model as national policy through its School Health and Nutrition Guidelines, and the Ministries of Health and Education signed a memorandum of understanding in 2022 to scale nationally.
It costed the alternative. The calculation that building outside government structures would be five times as expensive is a strategic comparison most organizations never run, and it is the reason the $1.50 per child figure is credible at national scale.
It adapted under pressure and the adaptation stuck. During COVID-19 the organization helped the Zambian government shape education policy and guidelines, used its School Health Worker network to disseminate accurate health information, and was subsequently contracted by the Centers for Disease Control and Prevention and the Ministry of Health to turn schools into syndromic surveillance hubs. A pandemic pivot that became a permanent national function is a rare outcome.
Further Reading
Organization Sources
- Healthy Learners homepage, source of the mission framing, the under-five blind spot argument, and the $1.50 per child figure. healthylearners.org
- Healthy Learners, The Impact, source of the 60 percent schistosomiasis reduction, the teacher empowerment findings, and the 1.4 million students, 1,070 schools, and 8,500 School Health Workers counts. healthylearners.org/the-impact
- Healthy Learners, The Model, source of the ten-step model, the buddy system and attendance review mechanisms, the health room structure, the referral and follow-up design, the clinical decision support application built with THINKMD, and the surveillance and health education feedback loop. healthylearners.org/the-model
- Healthy Learners, The Mission, Our Story, Reports and Financials, and COVID-19 Response. The Mission, Our Story, Reports, COVID-19
Peer-Reviewed Evidence
- Wei, D., Brigell, R., Khadka, A., Perales, N., and Fink, G. (2019). "Comprehensive school-based health programs to improve child and adolescent health: Evidence from Zambia." PLOS ONE 14(5): e0217893. The matched-control study. Source of the 38 percent morbidity and 52 percent stunting findings, the confidence intervals, the non-significant weight, overweight, thinness, and absenteeism results, and the study design. PLOS ONE
- "Understanding the burden and distribution of health conditions in Zambia's school-aged population: evidence from the school health programme." 2026. Retrospective analysis of the program's clinical decision support system data across 503 schools in 17 districts and five provinces, covering 203,471 learners and 319,395 conditions in 2024. pubmed.ncbi.nlm.nih.gov
Outside Assessment and Coverage
- Spring Impact, "Healthy Learners: Embedding Health Education Systems Within Government Structures," February 2025. Source of the five-times-costlier calculation and the four factors behind the government partnership strategy. springimpact.org
- Centre for Tropical Medicine and Global Health, University of Oxford, February 2021. Source of the national policy adoption through the School Health and Nutrition Guidelines and the Centers for Disease Control and Prevention syndromic surveillance contract. tropicalmedicine.ox.ac.uk
- Center for High Impact Philanthropy, University of Pennsylvania, profile of Healthy Learners. Independent assessment giving $1.51 per student annually, consistent with the organization's reported $1.50, and less than one percent of Zambia's per-student primary education spending. Corroborates the 48 percent deworming and 47 percent vitamin A coverage findings and the 60 percent schistosomiasis reduction. impact.upenn.edu/healthy-learners
- Fundación Netri, 2021 grant profile. Source of the earlier scale figures and the national expansion timeline. fundacion-netri.org
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