Marie Curie theory of "radioactivity" (a term that she coined), techniques for isolating radioactive isotopes, and the discovery of two elements, polonium and radium. Under her direction, the world's first studies into the treatment of neoplasms were conducted using radioactive isotopes. She founded the Curie Institutes in Paris and in Warsaw, which remain major centres of medical research today. During World War I, she developed mobile radiography units to provide X-ray services to field hospitals. While a French citizen, Marie Skłodowska Curie, who used both surnames, never lost her sense of Polish identity. She taught her daughters the Polish language and took
Lycée français Marie Curie de Zurich administration of education ("Bildungsdirektion"), canton of Zurich, nor approved by the Swiss Federal State Secretariat for Education, Research and Innovation (SERI). The Lycée Français Marie Curie de Zurich (LFZ) is one of 493 registered establishments, which form the network of French schools abroad. As such, it is approved by the French Minister of Education. This guarantees compliance with the French curriculum as well as the recognition of the choice of study pathways and the exams taken by the pupils. On the other hand, it depends upon the French Minister of Foreign Affairs and more specifically on the Agency for French