Insights from a mapping exercise conducted in eight countries to collect descriptions of teacher career structures and related implementation challenges. The findings from the mapping exercise highlight key aspects that policy makers need to consider before embarking on teacher career reforms. The results suggest that some ‘pre-requisites of the reform’ are essential for its success no matter which career structure is chosen. By Barbara Tournier, IIEP-UNESCO. More information on http://www.iiep.unesco.org/en/how-can-teacher-careers-be-reformed-cies2017-3899