Cholis Sa'dijah

Teachers' Representation in Solving Mathematical Word Problem

The use of multiple representations in mathematics learning plays a vital role to help students build conceptual understanding and solve mathematical problems. Therefore, teachers insight and view about the use of multiple representations in teaching mathematics requires more attention. The present study is aimed to investigate how representations used by mathematics teachers in solving the word problems in their teaching. The subjects for this study are junior high school teachers of mathematics. The data analysis indicated that teachers tend to use one form of representations to solve the word problem rather than use all forms in their mathematics instruction. Implications of the study finding on teachers and their practices are to be discussed.

Error Analysis on Prospective Teacher in Solving the Problem of Critical Thinking Mathematics with Apos Theory

Abstrak: Mathematical critical thinking is an essential ability for prospective teachers. The prospective teachers must be able to use the ability to think critically well so that students who are taught can also have good mathematical critical thinking skills. However, sometimes prospective teachers have a mistake in solving the problem of critical mathematical thinking skills. The present paper aims to analyze the mistakes of prospective teachers in solving the problem of critical mathematical thinking skills. The type of research method is descriptive with the qualitative approach. The subject in this research is one student of semester VI. The methods used in this research include test method amounting to one essay question, interview method, and triangulation method. The findings show that the prospective teacher on the focus indicator can be completed well whereas the indicators of reason, inference, situation, clarity, and overview, the teacher cannot solve well. Causes of the teacher error based on APOS theory are (1) error in distinguishing between commutative and addition characteristic of multiplication on matrix, (2) error in multiplication operation on the matrix, (3) error inequality of two matrices, and (4) error in the concept of inverse equation matrix.