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'''G.B. Halsted''' was a [[mathematics]] teacher at the University of Texas at Austin in the early twentieth century. He was interested in and a supporter of [[non-Euclidean geometry]] and translated into [[English]] the books of its two founders, [[Janos Bolyai]] and [[Nikolai I. Lobachevsky]]. He advocated the teaching of non-Euclidean geometry in high school instead of traditional [[Euclidean geometry]], which he viewed as obsolete.<ref>''A History of Mathematics Education in the United States and Canada'' National Council of Teachers of Mathematics (NCTM) yearbook.</ref>  

'''G.B. Halsted''' was a [[mathematics]] teacher at the University of Texas at Austin in the early twentieth century. He was interested in and a supporter of [[non-Euclidean geometry]] and translated into [[English]] the books of its two founders, [[Janos Bolyai]] and [[Nikolai I. Lobachevsky]]. He advocated the teaching of non-Euclidean geometry in high school instead of traditional [[Euclidean geometry]], which he viewed as obsolete.<ref>''A History of Mathematics Education in the United States and Canada'' [[National Council of Teachers of Mathematics]] (NCTM) yearbook.</ref>  

==References==

==References==