Movshovitz-Hadar, Nitsa, Professor of mathematics education at Technion – Israel Institute of Technology. Emeritus since 2004. In 2003: Laureate in Residence at La Villa Media, Grenoble France. 1998-2002: Director, Israel National Museum of Science. Since 1975 on the faculty at Technion, sharing her research and development interests, combined with 12 years of high-school mathematics teaching experience, with prospective mathematics teachers. She headed major curriculum development projects; Founded in 1986 and since is the head of Kesher-Cham - R&D centre for improving and reviving mathematics education. Published one book (with J. Webb) and many papers (one of which received in 1995 the MAA Lester Ford award with I. Kleiner). Developed unnovative curriucula, among them an award ainner series of video drama in mathematics for the Israel Instructional Television. Enjoying giving public lectures in mathematics since 2009.

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one equals zero מאת Nitsa Movshovitz-Hadar One equals zero and other mathematical surprises is a collection of paradoxes' fallacies and mind bogglers suitable for those who like to spend time on their own coping with challenges, and for interweaving in the mathematics classroom for raising students' interest. It covers plethora of topics such as a proof that all obtuse angles are right ones and that all men are bald, a second thought about the truth behind the sum of the angles in a triangle is 180, and behind the infinitude of prime numbers, algebraic demonstration that 2 is greater than 3 and that 0ne equals zero, and many more. How come? Where is the flaw? – seeking answers to these queries bring about sharpening concept understanding and adds to the surprise embedded in doing mathematics. Each task is about 1-2 pages long and is accompanied by explanations and sometimes historical notes as well. ...