The Teachers' International Trade Secretariat or International Trade Secretariat of Teachers (ITST) was a global union federation bringing together unions representing schoolteachers.
The International Federation of Civil Servants and Teachers was formed in 1925, but in many countries, teachers were not part of the same unions as civil servants, and preferred to organise separately.
Like its predecessor, it affiliated to the International Federation of Trade Unions.
[1][2] In 1945, the federation affiliated to the new International Professional Department of Education (DPIE), and the following year, it merged into the new World Federation of Teachers' Unions.
Some members unions refused to join, and instead helped found the new Joint Committee of International Teachers' Federations.