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Organizations need fast, affordable ways to optimize program cost-effectiveness on the path to scale. Iterative A/B testing is emerging as a practical, low-cost method for social and public sector organizations to learn, adapt, and improve rigorously.

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At Youth Impact, we’ve been running A/B tests for nearly a decade—75 in total, now averaging one per program each school term—and we support partners to run their own. We created this Iterative A/B Testing Toolkit as a public good; it codifies what we’ve learned, explains how to get started, outlines best practices, and shares tools and tips developed through years of field-based testing. Our goal is to make A/B testing accessible to any organization ready to strengthen its learning systems and scale its impact.

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If you are interested in receiving formal support from us with introducing A/B testing into your organization, please visit our A/B testing support page for more information.

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This toolkit version was last updated December 2025