In this second Unions21 bite-size masterclass, Mary Bousted, Joint General Secretary of the National Education Union speaks on how levels of engagement and union education were transformed by embracing the need of members for continuing professional development (CPD). There is expert analysis from Becky Wright, SPERI’s Tom Hunt, and Simon Sapper. We welcome the support of the University of Sheffield's Political Economy Research Institute, known as SPERI, and Beyond Trafficking and Slavery on openDemocracy. (Beyond Trafficking and Slavery is non-profit project combining clear writing with rigourous scholarship to help everyone better understand exploitation in the world of work. Find out more at opendemocracy.net/beyondslavery.) Music courtesy of Podsummit.com. A Makes-you-Thinkproduction.