Stacking the Deck: Reversibility and Reasoning

2020 ◽  
Vol 113 (1) ◽  
pp. 65-68
Author(s):  
Jessica T. Ivy ◽  
Sarah B. Bush ◽  
Barbara J. Dougherty

To promote reversibility and strengthen number sense, we created an engaging and novel rational number exploration, which promoted flexible and reflective thinking. A class of fifth-grade students took an active role in a collaborative learning task, discussed their strategies, revisited the task, and reflected on their self-constructed generalizations.

2010 ◽  
Vol 108-111 ◽  
pp. 1446-1451
Author(s):  
Su Wei Lin ◽  
Pi Hsia Hung

The purpose of this study was to develop a computerized and interactive number sense dynamic assessment system (CNSDA) on number sense to investigate the characteristics of elementary students’ performance. Number sense is the ability of awareness and reasoning for the relationships among the numbers embedded in the authentic context or situation. Around 150 fifth grade students were sampled. The results show that the adaptive hint system of CNSDA could promote the students’ number sense effectively. The correlation coefficients between CNSDA posttest and the Mathematic Computerized Adaptive Ability Test (MCAT) and the Computerized Estimation Test (CET) are higher than the static pretest. For the students with weaker number sense, CNSDA is a helpful learning and assessing resource.


2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Annisa Mutmainnah ◽  
Zetra Hainul Putra ◽  
Syahrilfuddin Syahrilfuddin

This research was aimed to find the relationship between the fifth-grade students’ number sense and mathematical problem-solving. The participants of this study were 73 fifth grade students from a private Islamic school in Pekanbaru, Indonesia. This study applied a quantitative research method, namely a simple correlation. Instruments for measuring students’ number sense consist of 5 indicators; number concepts, multiple representations, effects of operations, equivalent expressions, and computing and counting strategies. While, the instruments to measure students’ problem-solving consist of 4 domains; numbers, fractions, geometry, and measurements. The results showed that there was a significant correlation between students’ number sense and mathematical problem-solving. After that, a correlation test was also conducted between each number sense indicator and each mathematical problem-solving domain. The indicator of computing and counting strategies has the highest correlation with measurement.


Author(s):  
Frida Marta Argareta Simorangkir ◽  
Ribka Kariani Br Sembiring

The purpose of this study was to determine the effectiveness of Lectora Inspire assisted mathematics learning media on the number sense ability of elementary school fifth grade students. This research is a development research using 4-D design that is Define, Design, Develop and Disseminate or adapted to 4-D model that is defining, designing, developing and distributing. The test sample was the fifth grade students of Medan Kartika I-2 Private Elementary School. Products developed after being declared valid by experts / experts, then tested. Product validation results are stated to be very valid. Based on the results of the validation of learning materials by 93.82%, instructional design by 91.03%, media experts on Lectora Inspire by 87.5%, student responses to Lectora Inspire amounted to 95.57% and the teacher's response to the Lectora Inspire amounted to 89.56 % in very good category. Based on the average value of the data gain the ability of the student's number sense is 0.70 in the high category. Increased ability of student number sense is 0.27. From the results of the analysis, it can be stated that by using Lectora Inspire assisted mathematics learning media in learning related to fractional materials can increase the number sense ability of students.


JANACITTA ◽  
2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Harsiti Harsiti

This research is an effort to improve student learning outcomes in the material properties of light in science subjects through the Kinesthetic Virtual Auditory learning model (VAK). Classroom action research was carried out on fifth grade students of SD Negeri Rembes 02, Bringin District, Semarang Regency, 2016/2017 academic year. This research was motivated by the learning outcomes of many students who were still below the KKM in science lessons, of the 24 students who scored the Minimum Completeness Criteria were 10 students or 41.67%. The improvement of learning outcomes can be seen from the results of classroom action research in cycles I and II. In the first cycle students who completed with the minimum completeness criteria were 16 students or 66.67%. In cycle II students who completed with KKM 70 were 21 students or 87.5%, an increase of 20.83% from cycle I. While the student activity process also increased, where in cycle I only reached 67% or 16 students reached classical ketutansan. But in cycle II there was a very significant increase reaching 92% or 22 students played an active role in participating in the learning process.


2017 ◽  
Vol 1 (1) ◽  
pp. 38
Author(s):  
Hasan Basri

The problem in this research is found in Indonesian subjects that of the 30 students with KKM 75, which has already reached KKM as many as 15 people (41.7%), while that has not reached the KKM as many as 21 students (58.3%). The situation was caused by the teacher in explaining the lesson Indonesian still using a model of lectures and familiarize students to memorize, so that students can develop their ideas. The problems of this study as follows: Is the learning model application role playing can improve learning outcomes Indonesian fifth grade students of SDN 032 Kualu Kecamatan Tambang? This study aims to improve learning outcomes Indonesian grade students of SDN 032 Kualu Kecamatan Tambang through the application of learning models role playing. This research was conducted one month from the month of April 2015. The research was conducted 2 cycles, with each cycle consisting of two meetings as well as twice daily tests. Classroom action research in order to succeed, the researchers set the stage that action planning, action, observation and reflection. Based on the research results, it could be concluded that the activity of teachers in learning implementation role playing, in the first cycle average teacher activity amounted to 62.50% in the category of less pretty, and the activities of teachers in the second cycle of 84.72% in both categories once. Thus there is increased activity of teachers by 22.22% from the first cycle to the second cycle. The average activity of students in the first cycle the percentage of student activity in learning tends to increase. At the first meeting with the average student activity that is 61.25% with the category enough. At the second meeting increased by an average of student activity that is 81.25% with the category enough. The average increase in the activity of the students from the first cycle to the second cycle of 20.00%. The class classically considered complete when a class has achieved a score of 85% of the amount due or to KKM 75 then the class is said to be completed (90.00%). From the above shows that the application of learning models can improve outcomes role playing learning Indonesian grade students of SDN 032 Kualu Kecamatan Tambang, it can be concluded that the hypothesis is accepted as true action.


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