Main Article Content
The purposes of this research were to study mathematical problem-solving ability in inequality via problem posing activities and to study behaviors on problem-solving in inequality for Mathayomsuksa III students. The subjects of this study included thirty students in the second semester of the 2016 academic years from Phraharuthai Nonthaburi school. They were selected by using the cluster random sampling technique. Four of them were chosen as target students for case study in their behaviors on problem-solving in inequality. The experiment lasted for twelve fifty minutes period. One – Group Posttest-Only Design were used in this study. The research instruments included lesson plans via problem posing activities, the mathematical problem-solving ability in inequality test, and observation forms for mathematical problem-solving. The data were statistically analyzed using Z-Test for Population Proportion and behaviors analyzed using Artzt, Alice F.; & Armour-Thomas, Eleanor form. The results were as follow:
1. More than 60% of students participating in mathematics problem posing activities had ability in solving mathematical problems on inequality at the .05 level of significance.
2. Mathematical problem-solving behaviors of students participating in mathematics problem posing were expressed in three dimensions: Understanding the problem, Exploring and Planning, and Implementing.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
"The opinions and contents including the words in papers are responsibility by the authors."
"ข้อคิดเห็น เนื้อหา รวมทั้งการใช้ภาษาในบทความถือเป็นความรับผิดชอบของผู้เขียน"
 Rittle-Johnson, Bethany & Alibali, Martha Wagner. 1999. Conceptual and procedural knowledge of mathematics: does one lead to the other?. Journal of Educational Psychology, 91(1), p.175-189. Retrieved November 2, 2017, from https://dx.doi.org/10.1037//0022-0618.104.22.168
 Aumporn Makanong. 2547. Ekkasankhamson Raiwichathruesadilaekanprayukthangkansueksakhanittasat. (Copied).
 Vishnu Napaphun. 2551. A Study of Upper Elementary School Students’ Algebraic Reasoning. Doctural Thesis in Education. (Mathematics Education). Bangkok: Srinakharinwirot University
 Cholthicha Sachin. 2560. The Effects of Mathematics Learning Activities Using Cooperative Learning TAI to Promote the Ability in Analytical Thinking on Polynomial for Mathayomsuksa 1. Doctural Thesis in Education. (Mathematics Education). Mahasarakham: Mahasarakham University.
 Pirom Poonsawat. 2559. The Development of Teaching Model to Enhance the Problem Solving Capability In Mathematics for Fifth Grade Students. [online]. Journal of Industrial Education, 15(2), p. 72-79. Retrieved March 4, 2018, from https://22.214.171.124/journal/images/stories/year15_2/vol15_02_09.pdf
 Aumporn Makanong. 2559. Taksakrabounkantangkhanitsat: Kanpattanapueapattanakan. Bangkok: Chulalongkorn University Press
 Metta Marwiang. 2544. The Study of Mathematical Errors in Solving Mathematics Problems on Number Counting by Matthayom Suksa 1 Students of the Demonstration School, Khon Kaen University. Thesis of Master Degree. (Curriculum and Instruction). Khon Kaen: Khon Kaen University.
 Phromphan Udomsin. 2544. Kanwatlaekanpramoenphonkanriankansonkhanitsat. 3rd Edition. Bangkok: hulalongkorn University