Impacts of Montessori-Based Preschool Spaces in Rural Northern Nigeria on Girls Schooling and Learning Outcomes

Last registered on July 17, 2026

Pre-Trial

Trial Information

General Information

Title
Impacts of Montessori-Based Preschool Spaces in Rural Northern Nigeria on Girls Schooling and Learning Outcomes
RCT ID
AEARCTR-0009323
Initial registration date
May 02, 2022

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
May 03, 2022, 9:51 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Last updated
July 17, 2026, 4:27 PM EDT

Last updated is the most recent time when changes to the trial's registration were published.

Locations

Region

Primary Investigator

Affiliation
University of Pennsylvania

Other Primary Investigator(s)

Additional Trial Information

Status
Completed
Start date
2022-05-02
End date
2025-01-31
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
Estimates suggest that 250 million children under 5-years of age in low- and middle-income countries are at risk of not reaching their developmental potential (Lu, Black, & Richter, 2016). Compared to other regions, sub-Saharan Africa has the highest prevalence of children at risk, with 38% of the 143 million children younger than 5 stunted and 50% living in extreme poverty (Lu et al., 2016). Early childhood
education (ECE) can support child development; estimates suggest that the benefit–cost ratio of increasing ECE access in LMICs is considerable (Engle et al., 2011). Whether ECE targeted to the most vulnerable girls in a community can reduce gender inequalities is not known. Northern Nigeria has some of the world’s highest rates of child marriage and maternal mortality and lowest rates of female literacy. The most vulnerable girls in a rural northern Nigerian community are often those who have never even enrolled in school. The present study is a partnership between the Centre for Girls Education and academic researchers. Using a matched-pair mixed methods community-randomized trial, we test the impacts of a high-quality, Montessori-based ECE program for vulnerable girls on schooling and learning outcomes in the short- and medium-term, and on parental investments in girls’ education.
External Link(s)

Registration Citation

Citation
Wolf, Sharon. 2026. "Impacts of Montessori-Based Preschool Spaces in Rural Northern Nigeria on Girls Schooling and Learning Outcomes." AEA RCT Registry. July 17. https://doi.org/10.1257/rct.9323-2.0
Sponsors & Partners

Sponsors

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Experimental Details

Interventions

Intervention(s)
CGE has adapted the safe space methodology to rural schoolgirls’ need for strengthened core academic competencies and mentored support. The safe spaces—a safe physical space, friends, and a trained mentor—complement the girls' formal schooling and offer
opportunities to build trusting relationships and acquire critical life skills not currently offered in primary and secondary education. However, the most vulnerable girls are often those who have never even enrolled in school. Their parents—the poorest and most marginalized in the
community—face an intimidating array of barriers to educating their daughters. CGE has now reached 60,000 girls with two years of programming. Their Second Chance program helps out-ofschool girls (ages 10-14) gain the basic academic skills needed to enroll in a government school.

However, by that age the acquisition of basic academic skills such as literacy and numeracy is far more difficult. Building on the success of the safe spaces program, CGE developed the Ci Gaba preschool program (translated as going forward, advancing, or progressing), which starts with girls at age 3 and supports them as they progress through early childhood developmental milestones and prepares them for enrollment in primary school. The objectives are to (i) enhance school readiness (cognitive, fine motor and social-emotional skills), (ii) accelerate acquisition of basic literacy and numeracy skills, and (iii) facilitate primary school enrollment.

Teachers are selected from CGE’s former safe space program participants who have now advanced to the Federal Teachers’ College. An expert teacher at The Berkeley School (formally Berkeley Montessori) has led several 3-week workshops for the program staff and for professors at the Federal College of Education; the professors have now taken over the training of the mentors. In the Montessori approach, students are encouraged to direct their own learning at their own pace. In Ci Gaba, girls learn from working with Montessori educational
materials made locally at low cost in Nigeria from wood and other natural materials. Every material in a Montessori classroom supports an aspect of child development; CGE is finding the concreteness of the method to be ideal for the girls enrolled. State governments in northern Nigeria are slowly beginning to expand government preschools. The Montessori approach, as adapted by CGE, could prove to be ideal for this setting. For example, since the children work alone during work periods, teachers in government schools would have more time to spend one-on-one with them, even with the large student-teacher ratios found in government schools.
Intervention (Hidden)
Intervention Start Date
2022-06-06
Intervention End Date
2023-06-02

Primary Outcomes

Primary Outcomes (end points)
Year 1 follow-up: School readiness (early literacy, early numeracy, motor, social-emotional, and executive function) measured as a composite (primary analysis) and each individual component (secondary analysis)

Follow-up two and three (2025 and 2026): Primary school enrollment, cognitive development (literacy, numeracy, executive function)
Primary Outcomes (explanation)
At the first-year follow-up, we will collect data on girls’ skills and conduct longer surveys with parents. We will conduct direct assessments of early literacy, early numeracy, social-emotional, and executive function skills using the International Development and Early Learning
Assessment (IDELA; Pisani et al., 2018), a direct measure of holistic child learning and development designed for use in low- and middle-income countries.

As the second and third follow-ups, direct assessments with girls will be conducted as well as surveys with mothers and fathers.

Secondary Outcomes

Secondary Outcomes (end points)
Girls: Social and emotional development

Parents: Investments in girls' education (home-based cognitive stimulation, expectations and aspirations for daughter's education); school enrollment for siblings
Secondary Outcomes (explanation)
Surveys with parents will be conducted and adapted from an ECE study in Ghana (Wolf & McCoy, 2019) including socio-demographic characteristics, parental perceptions of quality ECE, and direct investments in girls’ education.

Experimental Design

Experimental Design
At baseline, we collect data on all sampled girls’ skills, brief surveys with parents, and community-level data (i.e., safety of access to the community, size of community, distance from road, distance from town, presence of a primary school, number (if any) female teachers at the
school, and economic base). These variables will be used in the match-pair randomization process. 16 communities in total will be recruited, yielding 8 pairs in total.
Experimental Design Details
Randomization Method
Match-pair community randomized trial.
Randomization Unit
Community
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
18 communities
Sample size: planned number of observations
466 girls (~25 per community)
Sample size (or number of clusters) by treatment arms
8 communities control, 8 communities Ci Gaba Preschool Safe Space intervention
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Using data from two previous studies in West Africa, we assume 80% power, an ICC for learning outcomes = 0.07, and R-square at Level 2 of 0.2 (given direct baseline assessments with all participants and a comprehensive set of community-level characteristics). Within each community, 30 girls are assessed (N = 540 total), giving a minimum detectable effect size of 0.37 standard deviations. Given the large contrast between treatment and control communities from internal monitoring data, this effect size is reasonable.
Supporting Documents and Materials

Documents

Document Name
Baseline child assessments
Document Type
survey_instrument
Document Description
File
Baseline child assessments

MD5: de01c72a1327ab5b33694ea2d91d4f40

SHA1: 9476956e8888645fe5f185eff941a21980b63f9e

Uploaded At: May 02, 2022

Document Name
Baseline parent survey
Document Type
survey_instrument
Document Description
File
Baseline parent survey

MD5: 96d9d3ffb96e25dccf3c5a5f5197c513

SHA1: cb2555986263400feb552c2b901ae77ce2623244

Uploaded At: May 02, 2022

IRB

Institutional Review Boards (IRBs)

IRB Name
Ahmadu Bello University
IRB Approval Date
2021-09-24
IRB Approval Number
954524802
IRB Name
University of Pennsylvania
IRB Approval Date
2022-07-12
IRB Approval Number
851571

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
Yes
Intervention Completion Date
June 30, 2023, 12:00 AM +00:00
Data Collection Complete
No
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Abstract
Quality early childhood education (ECE) can improve children's learning and development in low-­ and middle-­ income coun-
tries, but little evidence exists of programs targeting marginalized girls in vulnerable rural communities. This study used a
matched-­ pair mixed-­ methods community-­ randomized trial to evaluate a preschool program for marginalized girls (N=466,
Mage=5-­ years; W1=2022; W2=2023) from 16 rural Hausa-­ ethnic communities in Nigeria. The program yielded considerably
large impacts on every domain of school readiness assessed (dt=0.89–1.52). In qualitative interviews (N=30, data collected in
2023), parents discussed witnessing their daughters' learning and development as well as their future educational and life goals
for their daughters. Results demonstrate that access to high-­ quality ECE in highly disadvantaged communities can dramatically
improve girls' learning and potentially change parental perceptions about girl-­ child education.
Citation
Wolf, S., Bernard, J., Ezeugwu, C., Ahmad, L., & Bello Gurin, K. (2025). Impacts of the Preschool Safe Space program on marginalized girls in Northern Nigeria. Child Development, 96(3), 1128-1147.

Reports & Other Materials