Este trabalho apresenta uma abordagem sobre as novas tecnologias no contexto escolar, com vistas para aplicação do GeoGebra em trigonometria. O objetivo é nortear professores da educação básica na preparação de aulas usando o GeoGebra, visando ao enriquecimento do tema trigonometria em sala de aula. As atividades propostas estão divididas em três grupos: trigonometria básica, funções trigonométricas e equações trigonométricas. Cada uma possui um alto nível de detalhamento, com o objetivo de incentivar o uso por professores com pouco ou nenhum conhecimento do software, bem como incentivar atividades que promovam a criação por parte dos alunos. A ideia é que os alunos construam as atividades, aprendendo a utilizar o software, interagindo por meio da movimentação dos objetos, e tirando suas conclusões pertinentes às atividades. De maneira geral, pretende-se contribuir para o desenvolvimento do raciocínio lógico do aluno por meio do ensino de Matemática agregando a utilização de tecnologia, de forma que o aluno não seja somente um expectador, mas sim, participante da construção da própria atividade. / This work presents na approach to new Technologies in the educational context, with a view to applications of the GeoGebra in trigonometry. The goal is to guide teachers of the basic education in preparing lessons using GeoGebra, aiming to enrich trigonometry the in the classroom. The proposed activities are divided into three groups : basic trigonometry, trigonometry functions and trigonometry equations. Each one has a high level of details, in order to encourage the use by teachers with little or no knowledge of the software, and also encourage activities that promote the creation by the students. The idea is that students build the activities, learning how to use the software, interacting by moving objects, and taking their conclusions about the activities. In general, one intends to contribute to the development of logical thinking of students through the teaching of Mathematics adding the use of technology, so that the student is not only a spectator, but, participant of the construction of their own activity.

Este trabalho apresenta uma abordagem sobre as novas tecnologias no contexto escolar, com vistas para aplicação do GeoGebra em trigonometria. O objetivo é nortear professores da educação básica na preparação de aulas usando o GeoGebra, visando ao enriquecimento do tema trigonometria em sala de aula. As atividades propostas estão divididas em três grupos: trigonometria básica, funções trigonométricas e equações trigonométricas. Cada uma possui um alto nível de detalhamento, com o objetivo de incentivar o uso por professores com pouco ou nenhum conhecimento do software, bem como incentivar atividades que promovam a criação por parte dos alunos. A ideia é que os alunos construam as atividades, aprendendo a utilizar o software, interagindo por meio da movimentação dos objetos, e tirando suas conclusões pertinentes às atividades. De maneira geral, pretende-se contribuir para o desenvolvimento do raciocínio lógico do aluno por meio do ensino de Matemática agregando a utilização de tecnologia, de forma que o aluno não seja somente um expectador, mas sim, participante da construção da própria atividade. / This work presents na approach to new Technologies in the educational context, with a view to applications of the GeoGebra in trigonometry. The goal is to guide teachers of the basic education in preparing lessons using GeoGebra, aiming to enrich trigonometry the in the classroom. The proposed activities are divided into three groups : basic trigonometry, trigonometry functions and trigonometry equations. Each one has a high level of details, in order to encourage the use by teachers with little or no knowledge of the software, and also encourage activities that promote the creation by the students. The idea is that students build the activities, learning how to use the software, interacting by moving objects, and taking their conclusions about the activities. In general, one intends to contribute to the development of logical thinking of students through the teaching of Mathematics adding the use of technology, so that the student is not only a spectator, but, participant of the construction of their own activity.

The high school pass rate, for mathematics, in South Africa is very low. This is particularly so in trigonometry functions. One of the possible factors leading to this is the traditional method of teaching and learning. This study was undertaken to determine whether the use of Information and Communication Technology (ICT) would influence students’ learning of trigonometry functions. In order to answer this question the teaching and learning instructions developed were based on activity theory (AT) and action, process, object, and schema (APOS) theory. The study followed a non-equivalent control group, quasi-experimental design with a pre- post-test approach. Since it was not possible to randomly select participants for the study, intact groups were used. There were two groups: a control and an experimental one. Both groups wrote a standardized achievement pre-test to establish their comparability at the beginning of the study. While the control group was taught in the traditional way (grade 10-12 syllabus), the experimental group used the software Geogebra. The computer software (Geogebra) and the South African grade 10-12 syllabus for trigonometry functions were used during the lessons of the experimental group. At the end of the study, a similar post-test was administered on both groups to measure the comparative effects of either of the teaching methods on the performance of students. A t-test independent sample statistical analysis was performed on the findings using a statistics package, SPSS. The results of this investigation indicated that the use of the computer software, Geogebra, in the teaching and learning of trigonometry functions improved the performance of the Grade 12 students. / Mathematics Education / M. Sc. (Mathematics Education)