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This paper presents the design and construction of an educational material that focuses on complex numbers and functions. The design of the material took into account the important role of semiotic systems of representation in the process of learning mathematics. The construction resulted in a web site with a collection of interactive animations that make use of dynamical systems of algebraic and geometric representation. The product was tested with a group of students in the third year of high school, and the results show that, with the help of digital tools of semiotic mediation, it is possible not only to introduce new mathematics subjects in school, but also new forms of teaching and learning.

Uma introdução às funções de variável complexa no ensino médio: uma possibilidade através do uso de animações interativas