Deanery Digests are short, plain language summaries of the Department of Education’s research outputs. This Deanery Digest is based on the following published research article: Huang, R., Siraj, I. & Melhuish, E. (2024). Promoting effective teaching and learning through a professional development program: a randomized controlled trial. Journal of Educational Psychology: https://doi.org/10.1037/edu0000851