In-service Zimbabwean teachers’ views on the utility value of diagrams in the teaching and learning of geometry

Geometry is an essential component of mathematics which promotes the development of critical thinking and problem-solving skills. Geometry shapes are an integral part of our lives. This study focused on the teachers’ practices, specifically on how teachers ought to be equipped with a good understanding on the effectiveness of the use of use of diagrams in geometry teaching and learning. A mixed method approach comprising of questionnaires and interviews was used in this study. Ninety-one teachers participated in this study. The research findings were categorized using the four themes of utility, positive attitudes, negative attitudes, and teachers’ use of diagrams in geometry class. The study showed that diagrams are effective in the teaching and learning of geometry concepts. It is recommended that teachers could do well if they make use of technology in designing diagrams to be used in the teaching and learning of geometry.

Improving Motivation and Learning Outcomes With Contextual Teaching and Learning Strategies for Students in the Mathematics Education Study Program

This research aims to improve the student’s learning achivements and motivation in learning analityc geometry of mathematic education’s students at Bung Hatta University by using Contextual Teaching and Learning (CTL) strategy. This was a classroom action research with the research study was 38 of class A of mathematic education’s students who took a course of analityc geometry. The data was collected from quisioner student’s, field notes and final test. The data analysis was conducted in descriptive qualitative through data reduction, triangulation, and data display. Based on the research’s result can conclude that learning process by using CTL strategy can improve motivation and learning outcome in Field Analityc Geometry Class. The questioner of student’s learningmotivation showed that there are improving from 54,97 % on the cycle to 66,31 % on the cycle.The student’s learning result also improved from 24,32 % on the cycle to 70,27 % on the cycle. Key Word :contextual teaching and learning (ctl), learning activities, learning motivation, learning result.

Use of theories and models in geometry education research: A critical review

The aim of this article is to provide a critical review of the theories and the model used in the field of geometry education research. The article critically discusses van Hiele’s theory, Fischbein’s theory of figural concepts, Duval’ s theory of figural apprehension, the Spatial Operational Capacity (SOC) model by Wessels and van Niekerk, and the Sfard’s commognition theory. The van Hiele’s theory proposed a sequential order of development through which the learners construct their understanding of geometry concepts. Fischbein’ s theory of figural concepts suggested that a geometric figure is always comprised of a visible representation and a concept. Duval’s theory of figural apprehension underscored the heuristic value of a geometry figure for solving geometry problems. The SOC model by Wessels and van Niekerk emphasised the importance of instructional design incorporating a variety of physical and mental objects to work with to develop geometry concepts. Finally, the article discusses Sfard’s commognition theory that emphasises the communicative function of language in developing geometry concepts. There are two major concerns highlighted with respect to these theories and the model. Firstly, these theories and model emphasise the development of the two-dimensional geometry concepts, neglecting the development of the concepts of three-dimensional geometry. Secondly, these theories and the model fail to acknowledge the multilingual context of geometry class. The article aims to highlight the dearth of studies that explore the multilingual context of geometry class and calls for future studies in this direction.

Pengembangan Instrumen Penilaian Autentik Pada Materi Segiempat Kelas VII

This research aims to produce authentic assessment instruments in mathematics learning materials plan geometry class VII in terms of aspects of validity and practicality as well as to determine the potential effect. This study uses research development methods (development research) type of formative research involving 32 seventh grade students of SMP Negeri 24 Palembang. In this study a series of instruction developed through several stages of self evaluation, expert reviews and one-to-one, small group, and field tests. This research produces authentic assessment on the material properties of the material, the circumference and area of a rectangle. This study includes a series of learning consists of two activities on properties and circumference & area of a rectangle. The results of the development of authentic assessment instruments shows that with them knowing that they are assessed by three aspects (cognitive, affective, and psychomotor) students are very enthusiastic to learn, able to work on the problems with a good, brave respond and put forward the idea of both written and verbal are associated with a square long.