%0 Journal Article %T Leadership and Teamwork in the Student Union: Historical Constants and Contextual Variables %A Teslenko, A.E. %A Fedotova, E.L. %K student leadership, trade union movement, evolution of teamwork models, “core profile” of a student trade union leader %J Standards and Monitoring in Education %D 2026 %N 14 %P 3 %I INFRA-M Academic Publishing LLC.