The "Evolving 5-19 Biology" report (RSB, 2021) presents eight key recommendations and a framework for the development of biology curricula for ages 5-19. The framework proposes organising the curriculum in 23 coherent themes that form learning progression pathways. These pathways build answers to seven 'big questions' related to big ideas of biology across three dimensions: practices, concepts and applications. The report is aimed at policymakers but also provides inspiration for teachers looking to redevelop their school biology curriculum. Here, two of the report's lead authors discuss its importance, ethos and intended impacts on biology curriculum policy and teaching.