Fay Cosgrove has been a primary school teacher since 2005 and is a regional lead practitioner for numeracy. She is a senior leader at her school, a facilitator for the Outstanding Teacher Programme and consults on the Welsh government’s expert panel. She has trained and mentored pre-service teachers, in-service teachers and maths co-ordinators. She has a master’s degree in education and social science research methods. She has conducted research for the National Network for Excellence in Maths. She is an ESRC-funded PhD candidate at Cardiff University. Her research interests include working qualitatively and quantitatively with teacher professional learning, the STEM gender gap, psychometric scale development, and maths anxiety in children and teachers.