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 Lycée français Marie Curie de Zurich Lycée Français Marie Curie de Zurich (LFZ), ) is a French international school in four campuses in Dübendorf in the Zurich metropolitan area. As of 2012 most of the students are French nationals. LFZ's Kindergarten and primary education program ("Primary School") as well as its lower secondary education program ("Collège" on the "Sekundarstufe" level) are approved by the bureau for elementary school ("Volksschulamt"), administration for education ("Bildungsdirektion"), canton of Zurich. However LFZ's upper secondary education program ("Lycée") is neither approved as a Mittelschule by the bureau for gymnasial and vocational education ("Mittelschul- und Berufsbildungsamt"),