This paper examines the development of indicators measuring attacks on education through a case study of the Global Coalition to Protect Education from Attack (GCPEA). As GCPEA and its partners have brought the problem of attacks on education to the attention of global civil society, they have engaged in contestation to define attacks on education and construct indicators to track the relevant violations. These debates are significant in that indicators are a tool of global governance that shape policymaking and resource allocation. The discussion draws on the author's decade of experience working among groups focused on the protection of education, including direct involvement developing indicators on attacks on education, and on three sets of qualitative interviews. It analyses how resource limitations, organisational agendas, challenges of measurement and verification, and global power dynamics exert pressure towards a more narrow understanding of attacks on education. This limits the transformative potential of the protecting education agenda. The discussion illustrates that EiE actors must consider the ways that they measure their work in ongoing conversations about creating a decolonial and more equitable field of practice.