Pembelajaran Matematika Berbantuan Kalkulator: Studi Kasus Penggunaan Kalkulator Texas Instrument TI 89 pada PBM Matematika di SMK MUHAMMADIYAH IV YOGYAKARTA
By : Drs. Marsigit MA Dan Retno Siswanto SPd
Summary by : Fatikha Akfini Anantaputri (09313244012)
The importance of a calculator is to become a bridge for arithmetic and algebra (Tenoch E. Cedillo; 2002:1). In understanding the relationship between arithmetic and algebra, students get problems. According to Lee and Wheeler (1989: 41-54) the problem was found on the readiness of students in using algebra to solve algebra problems. Types of calculators had great development. Judging from their use, calculator consists of two types. Type consists of two kinds, namely ordinary calculators and scientific calculators.
One example of a scientific calculator is a graph calculator. Graph calculator has its own advantages than ordinary calculator. The advantage lies in the ability of the calculator to solve math problems quickly and display them in graphical form. Another advantage of the graph calculator is that it can create a program that can solve math problems.
Benefits that can be explored from the use of calculators in the book Contemporary Mathematics Learning Strategies (2001: 241-244) are: a) help in understanding math concepts, b) help to strengthen computational skills, c) develop a high level thinking skills, d) increase problem-solving skills, and e) make problem solving more realistic.
Stages use calculators as a learning tool in mathematics at SMK Muhammadiyah Yogyakarta IV, can be carried out as follows:
The first stage is the stage of understanding about the importance of graph calculators. The essence of the process of understanding is explaining the basic and detail about the graph calculator.
The second stage is the stage of understanding the theory and use of graph calculators in solving the problem equations and inequalities. This second process is focused on how students understand the command, symbolic manipulation, and graphs to solve problems and equations
inequalities with graph calculator.
The third stage, namely stage of entering data into graph calculator. The data entering process into the calculator is the process of moving the language of mathematics in terms of graph calculators.
The fourth stage is the stage interpretation of the graph calculator screen and draw conclusions.
From those processes, students will experience the process respectively. This means that the processes are inductive process.
From research conducted, noted there are several aspects of the use of graph calculators in learning mathematics as follows:
a. Graph calculator is useful to determine and match the graphic images
b. Graph calculator is useful to determine and match the to the set of solution
c. Graph calculator to give the real experience of graphic images.
d. Solving about equations and inequalities can use the command, symbolic manipulation and graphics.
e. Graph calculator is useful to provide answers to the previously calculated without a calculator and accelerate solving mathematics problems.
f. The constraints experienced by students in using the graph calculator are paraphrase sentences in the language of mathematics to language of calculator and express every calculator display into a mathematical sentence.
g. By using graph calculator in learning mathematics, math becomes more interesting and math problem solving becomes easier.
h. If the use of graph calculators with no offset the ability to understand the operating procedures and to think mathematically it can cause a high level of dependence, loss
confidence, and lazy thinking.