This paper examines the mathematical knowledge for teaching (MKT) in Indonesia, specifically in school geometry content. A translated and adapted version of the MKT measures developed by the Learning Mathematics for Teaching (LMT) project was administered to 210 Indonesian primary and junior high teachers. Psychometric analyses revealed that items related to classification of quadrilaterals were difficult for these teachers. Further interactions with teachers in a professional development setting confirmed that teachers held a set of exclusive definitions of quadrilaterals.

This paper examines the mathematical knowledge for teaching (MKT) in Indonesia, specifically in school geometry content. A translated and adapted version of the MKT measures developed by the Learning Mathematics for Teaching (LMT) project was administered to 210 Indonesian primary and junior high teachers. Psychometric analyses revealed that items related to classification of quadrilaterals were difficult for these teachers. Further interactions with teachers in a professional development setting confirmed that teachers held a set of exclusive definitions of quadrilaterals.

TITLE: Didactical situations in mathematics at lower secondary level. The classification of quadrilaterals based on selected characteristics. AUTHOR: Bc. Kateřina Vladyková DEPARTMENT: Department of Mathematics and Mathematical Education SUPERVISOR: Prof. RNDr. Jarmila Novotná, CSc. ABSTRACT: This thesis deals with the possible use of the Theory of didactical situations in mathematics at the lower secondary level of Czech school. It is specifically focused on the classification of quadrilaterals based on selected characteristics. The thesis consists of two parts, theoretical and practical. The theoretical part deals mainly with the introduction of Theory of didactical situations, defining and explaining their basic concepts. The thesis also briefly introduces currently existing curricula in the Czech Republic, in which quadrilaterals were the author's main focus. Furthermore, the topic is analyzed from educational materials (textbooks) used in Czech primary schools. In the experimental part of the thesis the author presents a detailed script of educational unit. It is a practical demonstration of a particular theory of didactic situations in teaching mathematics at the Czech elementary school, which is developed and implemented according to the principles of the theory of didactic situations. The thesis...