Mathematical modelling with a graphics calculator.

Introduction

Calculators are becoming more sophisticated, more widely available and less costly. Many ambitious claims have been made about the benefits of such tools in mathematics education, but we should not rely on enthusiasm, opinions or wishful thinking. Mathematics is a powerful means of communication. It can be used to solve problems, describe reality and test assertions. Experimentation, observation and reflective criticism will inform us about the potential role of calculators in these aspects of mathematics, so that technology may enhance the teaching and learning environment. In this paper we will describe one of a series of small scale studies involving the use of calculators in Scottish schools.

The Texas Instruments Calculator Based Laboratory (CBL) is a battery powered, portable, data collection device. A variety of probes can be connected to the CBL so that data such as temperature, light intensity, sound levels and distance can be collected. The data is sent to a graphics calculator for analysis. The equipment enables students to undertake mathematical modelling through problem solving using real data.

This study has evaluated the use of the CBL in a number of Scottish secondary schools, during 1995/96. The project involved 12 schools and 530 learners in the Lothian region. The activities were used with whole classes of pupils, aged from 13+ (S2) to 17+ (S6) years, in class sizes ranging from 8 to 30. Classroom observation, record sheets and discussions with the class teachers all provided feedback which assisted in the development and modification of the activities.

The activities involve pupils in collecting and analyzing data using TI-82 graphics calculators. The easy transfer of data to the students' calculators, via the link cable, facilitates self-paced, independent work, either individually or in small groups. The use of an overhead-projector calculator and screen allows whole class viewing and involvement with large groups of pupils.

Grant - 2 OCT 1996



There is a PDF file available for this paper.


Gómez, P. & Waits, B. (Eds.) (1996). Roles of calculators in the classroom.

Mail comments to Pedro Gómez: pgomez@uniandes.edu.co