ICAN (International Common Assessment of Numeracy), a simple-to-use and scalable tool that measures children’s foundational numeracy, is designed to align to SDG 4.1.1 (a), an indicator for which existing international assessments are not able to generate comparable data. This report highlights the features of ICAN that make it relevant to Global South contexts. In addition, the report summarises the first large-scale implementation of ICAN on scale.