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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

Fachrudin, Achmad Dhany; Putri, Ratu Ilma Indra; Darmawijoyo – Indonesian Mathematical Society Journal on Mathematics Education, 2014

The purpose of this research is to know how Naïve Geometry method can support students' understanding about the concept of solving quadratic equations. In this article we will discuss one activities of the four activities we developed. This activity focused on how students linking the Naïve Geometry method with the solving of the quadratic…

Descriptors: Mathematical Concepts, Geometry, Equations (Mathematics), Problem Solving

Murdiyani, Nila Mareta; Zulkardi; Putri, Ratu Ilma Indra; van Eerde, Dolly; van Galen, Frans – Indonesian Mathematical Society Journal on Mathematics Education, 2013

Subtraction has two meanings and each meaning leads to the different strategies. The meaning of "taking away something" suggests a direct subtraction, while the meaning of "determining the difference between two numbers" is more likely to be modeled as indirect addition. Many prior researches found that the second meaning and…

Descriptors: Subtraction, Mathematical Models, Mathematical Formulas, Problem Solving

Nursyahidah, Farida; Putri, Ratu Ilma Indra; Somakim – Indonesian Mathematical Society Journal on Mathematics Education, 2013

This research aim is to know the students' understanding in adding number up to 20 using traditional game of dakocan and to acquire learning trajectory of adding number up to 20 using traditional game of dakocan for the first grade of primary school. This research used methodology of design research that consists of three phases, there are…

Descriptors: Mathematics Instruction, Foreign Countries, Grade 1, Elementary School Mathematics

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

Supporting Student's Ability in Understanding Least Common Multiple (LCM) Concept Using Storytelling

Triyani, Septi; Putri, Ratu Ilma Indra; Darmawijoyo – Indonesian Mathematical Society Journal on Mathematics Education, 2012

Several researches showed that students had difficulty in understanding the concept of Least Common Multiple (LCM) in Elementary School. This underlies the researcher to design a learning of LCM using storytelling, Legend "Putri Dayang Merindu" (LPDM), which contains situational problem related to LCM. The purposes of this study are to…

Descriptors: Foreign Countries, Mathematical Concepts, Story Telling, Elementary School Mathematics

Lestariningsih; Putri, Ratu Ilma Indra; Darmawijoyo – Indonesian Mathematical Society Journal on Mathematics Education, 2012

This research is aimed to determine the role of Indonesian folklore context namely the Legend of Kemaro Island in supporting average learning on 6 grade students with Pendidikan Matematika Realistik Indonesia (PMRI) approach. The method used is a design research that contains three stage namely preliminary design, teaching experiment, and…

Descriptors: Foreign Countries, Folk Culture, Mathematical Concepts, Relevance (Education)

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

Putra, Zetra Hainul; Darmawijoyo; Putri, Ratu Ilma Indra; den Hertog, Jaap – Indonesian Mathematical Society Journal on Mathematics Education, 2011

Knowing number facts up to 10 become crucial if we want students to solve addition and subtraction problems using more abbreviated strategies. Otherwise, students will keep counting one-by-one until they get an answer. One of important number facts is number pairs that make ten because it is an important "benchmark" that students will…

Descriptors: Foreign Countries, Grade 1, Mathematics Instruction, Mathematics Activities