TPSS is a research project that investigates ways of improving the pedagogy of STEM teaching in Ethiopia. The project is organised by Addis Ababa University and Durham University in the UK, in collaboration with six Colleges of Teacher Education (CTEs) in Ethiopia. It is funded by the Economic and Social Science Research Council (ESRC) and Department for International Development (DFID) in the UK, and is part of the Raising Learning Outcomes Research Program.