• Symposium on "History Teaching in Secondary Education". Elsinor, Denmark, 1965
  • Symposium on "History Teaching in Lower Secondary Education". Braunschweig, Germany, 1969
  • Meeting of Experts on "History Teaching in Upper Secondary Education". Strasbourg, France, 1971
  • Symposium on "Teaching about the Portuguese Discoveries in Secondary Schools in Western Europe Lisbon, Portugal, 1983