The Young STEM Leader Programme (YSLP) is an important feature of the Scottish Government's STEM Strategy. YSLP creates culture change through developing peer role models who challenge stereotypes and improve awareness and attitudes towards STEM. YSLP is having a major impact on the quality and extent of peer support available across primary and secondary schools in Scotland. Over 1200 Tutor Assessors, representing over 600 educational centres, have been trained and certificated to run YSLP with representation from all Scottish local authorities. Some 4000 Young STEM Leaders are working towards non-formal and formal awards. By 2022, YSLP will be available to all school pupils in Scotland.