TEJO was founded in 1938 as the Tutmonda Junular-Organizo (World Youth Organization) and took its current name in 1952.

TEJO organizes an International Youth Congress (Internacia Junulara Kongreso) each year in a different location around the world.

During the IJK there are concerts, presentations, excursions, and recreation, usually one week long and attended by a few hundred young people from several countries.

TEJO also publishes the Pasporta Servo, which is an international hospitality network of Esperanto speakers that accept Esperanto-speaking guests.

These seminars bring together an international group of young people to discuss a current issue.