Vocation : Education : Teacher

Henri Édouard Tresca (12 October 1814 – 21 June 1885) was a French mechanical engineer, and a professor at the Conservatoire National des Arts et Métiers in Paris.

Jules Tannery (24 March 1848 – 11 December 1910) was a French mathematician, who notably studied under Charles Hermite and was the PhD advisor of Jacques Hadamard. Tannery's theorem on interchange of limits and series is named after him. He was a brother of the mathematician and historian of science Paul Tannery.
Under Hermite, he received a doctorate in 1874 for his thesis Propriétés des intégrales des équations différentielles linéaires à coefficients variables.
Tannery was an advocate for mathematics education, particular as a means to train children in logical consequence through synthetic geometry and mathematical proofs.Tannery discovered a surface of the fourth order of which all the geodesic lines are algebraic. He was not an inventor, however, but essentially a critic and methodologist. He once remarked, "Mathematicians are so used to their symbols and have so much fun playing with them, that it is sometimes necessary to take their toys away from them in order to oblige them to think."
He notably influenced Pierre Duhem, Paul Painlevé, Jules Drach, and Émile Borel to take up science.
His efforts were mainly directed to the study of the mathematical foundations and of the philosophical ideas implied in mathematical thinking.
Tannery was "an original thinker, a successful teacher, and a writer endowed with an unusually clear, brilliant and attractive style."

Frédéric Jean Edmond Swarts (2 September 1866 – 6 September 1940) was a Belgian chemist who prepared the first chlorofluorocarbon, CF2Cl2 (Freon-12) as well as several other related compounds. He was a professor in the civil engineering at the University of Ghent. In addition to his work on organofluorine chemistry, he authored the textbook "Cours de Chimie Organique." He was a son of Theodore Swarts (chemist, *1839 Antwerpen; †1911 Kortenberg, Belgium) and a colleague of Leo Baekeland.

Eduard Sonnenburg (3 November 1848, in Bremen – 25 May 1915, in Bad Wildungen) was a German surgeon. He was a son-in-law to neurologist Karl Friedrich Otto Westphal.
After receiving his medical doctorate in 1872, he spent several years as an assistant to Georg Albert Lücke at the surgical clinic in Strassburg. In 1876 he qualified as a lecturer of surgery at the university. In 1880 he relocated to Berlin, where he worked under Bernhard von Langenbeck and Ernst von Bergmann.In 1883 he became an associate professor at the University of Berlin, and in 1890 was appointed director of the surgical department at the Krankenhaus Moabit. In 1913 he became an honorary full professor at the university.In 1886, he was a founding member of the Freie Vereinigung der Chirurgen Berlins (Free Association of Berlin Surgeons), an organization known today as the Berliner Chirurgische Gesellschaft. His name is associated with "Sonnenberg's sign", an indicator defined as bloody leukocytosis seen in appendicitis with localized peritonitis. He standardized Appendectomy, i.e. the surgery removing the vermiform appendix and was invited to perform the surgery for many nobles and royalties in Europe.

Charles-Emmanuel Sédillot (18 September 1804 – 29 January 1883) was a French military physician and surgeon. He was the son of orientalist Jean Jacques Emmanuel Sédillot (1777–1832), and an older brother to historian Louis-Pierre-Eugène Sédillot.
Born in Paris, he studied surgery under Alexis Boyer and Philibert Joseph Roux. In 1836 he became professor of operative surgery at Val-de-Grâce, followed by a professorship at Strasbourg five years later.Sedillot was a pioneer of urethrotomic and gastrointestinal operations, and known for his work with dislocations and his treatment of pyaemia. He is credited with coining the term "microbe" (from micros "small" and bios "life").

Paul Theodor Range (1 May 1879 in Lübeck – 29 August 1952 in Lübeck) was a German geologist and naturalist.
He studied natural sciences at the universities of Würzburg and Leipzig, receiving his doctorate in 1903. From 1906 to 1914 he worked as a government geologist in German South-West Africa, and afterwards performed scientific studies in the Sinai Peninsula. From 1921 he gave lectures in geology at the University of Berlin, becoming an associate professor in 1934. In 1936, he was named president of the Deutschen Geologischen Gesellschaft.Range is commemorated in the scientific name of the Namib sand gecko (Pachydactylus rangei), which was described as a species new to science by herpetologist Lars Gabriel Andersson in 1908.

Damian Kratzenberg (November 5, 1878 – October 11, 1946) was a highschool teacher who became head of the Volksdeutsche Bewegung (German-People's Movement), a pro-Nazi political group, in Luxembourg during World War II. He was executed after the war for collaboration with the Nazis.
Kratzenberg was the son of the administrator of the castle of Clervaux, a German immigrant. After receiving his baccalaureate at the Diekirch gymnasium, from 1898 to 1902 he studied literature in Luxembourg, Lille, Paris and Berlin. Following this, he taught Greek and German in Diekirch, Echternach, and from 1927 at the Athénée de Luxembourg.From 1927 to 1936, Kratzenberg was a member of the liberal party. From the mid-1930s, he became a supporter of Nazi Germany. From 1935 to 1940, he was the president of GEDELIT, the Luxemburger Gesellschaft für deutsche Literatur und Kunst (Society for German Literature and Art). In 1936, he received the Goethe-Medaille für Kunst und Wissenschaft.Kratzenberg became head of the regional branch of the Volksdeutsche Bewegung in 1940, and was appointed head of the Athénée de Luxembourg in 1941.Kratzenberg fled to Weißenburg in Bayern a few days before the liberation of Luxembourg on 1 September 1944. A letter to his daughter after the end of the war however gave his location away and Kratzenberg was apprehended by American military police, moved to Luxembourg and stood trial. He was sentenced to death on August 1, with the sentence carried out on October 11, 1946, at the shooting range of the barracks of the Holy Ghost Plateau in Luxembourg City.

Leona Ford Washington (1928 – August 5, 2007) was a community activist in Texas and founder of the McCall Neighborhood Center in El Paso. She taught for 39 years in the El Paso Independent School District. Washington composed the song, "The City of El Paso," which was adopted as the city's official song in the 1980s.