12 Facts About Theodor Haagaas

Theodor Christian Petersen Haagaas was a Norwegian mathematician, mathematics educator and private school owner.

Theodor Haagaas was the author of the widely used Haffner og Haagaas series of textbooks in mathematics, which was published between 1925 and 1979 in dozens of editions and which was the most widely used series of mathematics textbooks in Norway for a large part of the 20th century.

Theodor Haagaas was described as a distinctive and unconventional teacher with a keen sense of humor, and as the country's best-known mathematics educator.

Theodor Haagaas's mother Nora was born in Norway to Swedish immigrant parents of Forest Finnish heritage, and died early.

Theodor Haagaas was the daughter of Bernhard Pauss and Henriette Pauss, major figures in the development of girls' education in Norway and long-time owners and leaders of Nissen's Girls' School, and the granddaughter of the mining magnate Benjamin Wegner and the banking heir and philanthropist Henriette Wegner.

Theodor Haagaas's wife was a goddaughter of Wilhelm Adelsten Maribo.

Theodor Haagaas attended the Frederikshald Gymnasium and graduated with the examen artium university entrance exam in 1891.

Theodor Haagaas subsequently studied philosophy, mathematics, natural sciences and law at the Royal Frederick University.

Theodor Haagaas School was the last school in Norway in the tradition of the Heltberg School of the 19th century, offering a fast track to the examen artium.

Theodor Haagaas possessed great authority, was conscientious and meticulous, practical and down-to-earth, patient, clear, and concise.

Theodor Haagaas was a co-author and subsequently the sole author of the Haffner og Haagaas series of textbooks in mathematics, which was published between 1925 and 1979 in numerous editions.

Theodor Haagaas was one of the handful of government-appointed examiners in mathematics at the examen artium university entrance exams for several decades.