USING GRAPHIC CALCULATOR IN TRIGONOMETRIC LEARNING: A DIDACTICAL DESIGN FOR TEACHER

This study explored the activitiesusing a graphing calculator of 10th-grade high school students on the trigonometry topic. A total of 65 students were divided into two classes, the first class consisted of 32 students, and the second class consisted of 33 students. The main objective of this study is to present classroom activities enriched with graphing calculators and observe responses about teaching with this approach. This study is research on developing learning designs within the Didactical Design Research (DDR) framework presented in an exploratory narrative. Data were collected by using two trigonometry worksheets and lesson observations. The worksheets were constructed based on the following focus areas: behaviour of graphs, constructing related-angle formula, and overall performance of the learner. The result of this research is a learning design that has been tested on 65 high school students. The research results on how to analyze the results of the implementation of structured learning designs provide information that educators can use, including the use of graphing calculators to help and make it easier for students to identify graphs more quickly and make students accustomed to using trigonometric function symbols. Another finding from structured instructional designs is that working in groups allows students to share experiences more effectively.

O uso da calculadora gráfica GeoGebra em dispositivos móveis para o ensino de funções reais: um olhar para as publicações no Brasil

<p>O objetivo deste artigo é apresentar um levantamento das publicações no Brasil que abordam “O uso da <em>Calculadora Gráfica GeoGebra</em> em dispositivos móveis para o ensino de funções reais”. Para tal, foram analisadas as publicações de 2013 a 2019 disponíveis em três bases de dados, a saber: O portal de periódicos CAPES; Scielo e o Google Acadêmico. As buscas foram feitas utilizando a combinações dos descritores “Ensino”, “Função” e ''GeoGebra Graphing Calculator”. A metodologia utilizada possui uma abordagem qualitativa e o procedimento metodológico se caracteriza como uma pesquisa bibliográfica no modelo da metassíntese qualitativa proposto por Matheus (2009). As pesquisas analisadas apontaram que a Calculadora Gráfica-GeoGebra contribui para o ensino aprendizagem de funções em virtude do recurso de visualização gráfica, com isso estimula a participação e a cooperação dos estudantes nas aulas de matemática de modo que os mesmos sejam construtores das suas próprias aprendizagens.</p>

Table Techniques

There is a distinction between using technology as a tool for doing mathematical tasks and using it to develop conceptual understanding (Dick and Hollebrands 2011). In this article, the table feature of the TI-84 Plus graphing calculator is used in the second role, enabling students to participate in the reasoning and sense-making process. This article showcases four classroom activities that use tables as a dynamic tool for inquiry, applying numerical representations to algebraic, graphical, and geometric phenomena. Although these activities are presented using the TI-84 Plus CE graphing calculator, other calculator and computer platforms can be employed; see the Teacher Guide in more4U for details.

Influence of Context in Teachers' Perception of Graphing Calculator Use in Mathematics Instruction

This study focuses on the influence of socio-contextual factors in the interrelations between teachers' perceptions of the role of graphing calculators, as mediating tools, to help facilitate mathematics instruction of students from two different SES backgrounds. The main source of data are in-depth semi-structured interviews with four teachers, two from each SES school. To better understand the role of SES socio-context, this study suggests a framework, consisting of teacher, student, subject matter, and graphing calculator use, for graphing calculator integration in the classroom. The components of the framework were taken to be continuously in interaction with one another implying that a change or perturbation in one of the components affected all the other components. As such, addressing equity issues in connection to the successful integration of graphing calculator in the classroom requires continually creating, maintaining, and re-establishing a dynamic equilibrium among all components of the framework.