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Lestari, Umi Puji; Putri, Ratu Ilma Indra; Hartono, Yusuf – Indonesian Mathematical Society Journal on Mathematics Education, 2015

This study aims to investigate how set model can help students' understanding of addition of integers in fourth grade. The study has been carried out to 23 students and a teacher of IVC SD Iba Palembang in January 2015. This study is a design research that also promotes PMRI as the underlying design context and activity. Results showed that the…

Descriptors: Foreign Countries, Elementary School Mathematics, Grade 4, Mathematical Concepts

Lutfianto, Moch.; Zulkardi; Hartono, Yusuf – Indonesian Mathematical Society Journal on Mathematics Education, 2013

Solving mathematics contextual problems is one way that can be used to enable students to have the skills needed to live in the 21st century. Completion contextual problem requires a series of steps in order to properly answer the questions that are asked. The purpose of this study was to determine the steps performed students in solving…

Descriptors: Standardized Tests, Problem Solving, Mathematical Applications, Mathematics Activities

Jaelani, Anton; Putri, Ratu Ilma Indra; Hartono, Yusuf – Indonesian Mathematical Society Journal on Mathematics Education, 2013

Understanding of measuring time has difficulty for children because it is intangible. Standard units often used directly by teacher for learning time measurement. Many researches involved games in designing learning material to facilitate fun and meaningful learning for children. For this reason, learning of time measurement that connects with…

Descriptors: Time, Educational Games, Elementary School Students, Grade 3

Edo, Sri Imelda; Hartono, Yusuf; Putri, Ratu Ilma Indra – Indonesian Mathematical Society Journal on Mathematics Education, 2013

The chart of Indonesian student of mathematical ability development in Program for International Student Assessment (PISA) event during the last 4 periods shows an unstable movement. PISA aims to examine the ability of children aged 15 years in reading literacy, mathematics literacy, and science literacy. The concept of mathematical literacy is…

Descriptors: Foreign Countries, Secondary School Students, Secondary School Mathematics, Mathematics Instruction

Novita, Rita; Zulkardi; Hartono, Yusuf – Indonesian Mathematical Society Journal on Mathematics Education, 2012

Problem solving plays an important role in mathematics and should have a prominent role in the mathematics education. The term "problem solving" refers to mathematics tasks that have the potential to provide intellectual challenges for enhancing students' mathematical understanding and development. In addition, the contextual problem…

Descriptors: Problem Solving, Academic Ability, Elementary School Students, Formative Evaluation

Prahmana, Rully Charitas Indra; Zulkardi; Hartono, Yusuf – Indonesian Mathematical Society Journal on Mathematics Education, 2012

Several previous researches showed that students had difficulty in understanding the basic concept of multiplication. Students are more likely to be introduced by using formula without involving the concept itself. This underlies the researcher to design a learning trajectory of learning multiplication using Permainan Tradisional Tepuk Bergambar…

Descriptors: Foreign Countries, Elementary School Mathematics, Elementary School Students, Grade 3

Shanty, Nenden Octavarulia; Hartono, Yusuf; Putri, Ratu Ilma Indra; de Haan, Dede – Indonesian Mathematical Society Journal on Mathematics Education, 2011

This study aimed at investigating the progress of students' learning on multiplication fractions with natural numbers through the five activity levels based on Realistic Mathematics Education (RME) approach proposed by Streefland. Design research was chosen to achieve this research goal. In design research, the Hypothetical Learning Trajectory…

Descriptors: Foreign Countries, Grade 5, Elementary School Mathematics, Multiplication

Tasman, Fridgo; den Hertog, Jaap; Zulkardi; Hartono, Yusuf – Indonesian Mathematical Society Journal on Mathematics Education, 2011

Usually, multiplication is introduced to students to represent quantities that come in groups. However there is also rectangular array model which is also related to multiplication. Barmby et al. (2009) has shown that the rectangular model such as array representations encourage students to develop their thinking about multiplication as a binary…

Descriptors: Foreign Countries, Elementary School Mathematics, Elementary School Students, Grade 2

Helsa, Yullys; Hartono, Yusuf – Indonesian Mathematical Society Journal on Mathematics Education, 2011

The innovation of education is an important point of Pendidikan Matematika Realistik Indonesia (PMRI), one of them through traditional dance as a context of national cultural. Dance that collaborated with concept of mathematics, it is called Math Traditional Dance. This research aims to produce learning line (specific) the material of reflection…

Descriptors: Foreign Countries, Teaching Methods, Grade 4, Elementary School Students

Yuberta, Kurnia Rahmi; Zulkardi; Hartono, Yusuf; van Galen, Frans – Indonesian Mathematical Society Journal on Mathematics Education, 2011

Many researchers found that students have difficulties in understanding area measurement. Students mostly focus on applying formula to find the area of certain shapes without knowing what the area is and why the formula works. It is important for the students to know what attribute being measured and to construct the unit for area measurement.…

Descriptors: Foreign Countries, Measurement, Geometric Concepts, Mathematics Instruction

Pramudiani, Puri; Zulkardi; Hartono, Yusuf; van Amerom, Barbara – Indonesian Mathematical Society Journal on Mathematics Education, 2011

Learning about decimals is an important part in mathematics. However at the same time, decimals are known as the abstract numbers for students. Mostly in Indonesia, decimal is taught only as another notation for fractions or percentages. There are no meaningful references for them such as the use of concrete situations. This study aimed at…

Descriptors: Foreign Countries, Arithmetic, Mathematics Instruction, Teaching Methods