A calculadora deve ser usada em sala de aula?
Autor: Diego Cunha | Publicado: 2011-07-19T00:08:00-07:00

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Sim. Os Parâmetros Curriculares Nacionais (PCNs) orientam que cabe ao educador a tarefa de iniciar o aluno na utilização de novas tecnologias e a calculadora está incluída nelas.
Uma razão é social: a escola não pode se distanciar da realidade do aluno. Outra razão é pedagógica: a incorporação do instrumento pela escola permite explorar relações matemáticas e refletir sobre a grandeza numérica.
Os estudantes devem aprender a dominar diferentes estratégias de cálculo, conhecer os limites de cada recurso e, por fim, decidir a quais usar calculadora é mais adequado. Diante de um problema em que é necessário encontrar o resto de uma divisão inteira, por exemplo, o aluno precisa reconhecer que o instrumento não oferece essa informação diretamente no visor. Estimar mentalmente os resultados antes de usar a calculadora é uma das estratégias possíveis, assim como usá-la como uma ferramenta de controle e verificação de resultados com técnicas de papel e lápis - o que permite aos alunos a autonomia na correção.
Outro trabalho interessante consiste em empregar a calculadora para o estudo das representações decimais. Por meio de atividades de divisão de 1 por 2, 1 por 3, 1 por 4, 1 por 5 etc., usando o instrumento, os alunos podem levantar hipóteses sobre as escritas que aparecem no visor da calculadora e interpretar o significado dessas representações.

Por Bruna Nicolielo (bruna.nicolielo@abril.com.br). Com reportagem de Rita Trevisan  Fonte: Revista Nova Escola