Developing a Model to Support Students in Solving Subtraction

Autor/inn/en	Murdiyani, Nila Mareta; Zulkardi; Putri, Ratu Ilma Indra; van Eerde, Dolly; van Galen, Frans
Titel	Developing a Model to Support Students in Solving Subtraction
Quelle	In: Indonesian Mathematical Society Journal on Mathematics Education, 4 (2013) 1, S.95-112 (18 Seiten)Infoseite zur Zeitschrift PDF als Volltext kostenfreie Datei Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	2087-8885
Schlagwörter	Subtraction; Mathematical Models; Mathematical Formulas; Problem Solving; Instructional Design; Learning Activities; Number Concepts; Mathematics Education; Pretests Posttests; Photography; Video Technology; Transcripts (Written Records); Elementary School Mathematics; Educational Practices; Educational Strategies; Teaching Methods; Foreign Countries; Indonesia + Suchen Sie Ihr Suchwort? Subtraktion; Mathematical model; Mathematisches Modell; Mathematische Formel; Problemlösen; Lesson concept; Lessonplan; Unterrichtsentwurf; Lernaktivität; Number concept; Zahlbegriff; Mathematische Bildung; Fotografie; Elementare Mathematik; Schulmathematik; Bildungspraxis; Lehrstrategie; Teaching method; Lehrmethode; Unterrichtsmethode; Ausland; Indonesien
Abstract	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 second strategy rarely appeared in the mathematical textbooks and teacher explanations, including in Indonesia. Therefore, this study was conducted to contribute to the development of a local instruction theory for subtraction by designing instructional activities that can facilitate first grade of primary school students to develop a model in solving two digit numbers subtraction. Consequently, design research was chosen as an appropriate approach for achieving the research aim and Realistic Mathematics Education (RME) was used as a guide to design the lesson. This study involved 6 students in the pilot experiment, 31 students in the teaching experiment, and a first grade teacher of SDN 179 Palembang. The result of this study shows that the beads string could bridge students from the contextual problems (taking ginger candies and making grains bracelets) to the use of the empty number line. It also shows that the empty number line could promote students to use different strategies (direct subtraction, indirect addition, and indirect subtraction) in solving subtraction problems. Based on these findings, it is recommended to apply RME in the teaching learning process to make it more meaningful for students. (As Provided).
Anmerkungen	Indonesian Mathematical Society. Jl. Padang Selasa 524, Palembang, South Sumatra 30139, Indonesia. Tel: +618-127-106777; Fax: +627-113-20310; Web site: http://www.jims-b.org/
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01