The Enhancement of Students' Cognitive Learning Achievement Through Contextual Learning Model on Multiplication and Division’s Matter. This research was based on the number of students who produce ...the resuits of cognitive learning under minimal mastery. The purpose of this research was to improve student cognitive learning outcomes and improve the learning process by applying the contextual learning model. The approach used in this research was descritptive qualitative approach with classroom action research method consisting of two cyeles. Subjects in this researchwere the students of elementary school classs III 48 Lepung Beruang were 43 students who taught by the modeling of contextstual. The instrument for measuring cognitive learning outcomes. The data obtained were analyzed by using desctiptive whit mean and Classical completeness value. The result of descriptive analysis shows that in cycle I, the result of 29 students is complete with an average of 66,00 and classical completeness of 67,44%. Furthermore, in cycle II, students who complete 37 students with average of 78,60 and classical completeness of 86,04% of students into good category. The results of this study can be concluded tahat the modeling of use can improve student learning outcomes on mathematic materials.Based on, the result of the teacher activity observation has been received 60% the first meeting, 65% the second meeting on the first cycle, meanwhile on the second cycle at the first meeting has got constantly becoming increasing 100%. The results of this research can be concluded that the use of contextual learning can improve the cognitive learning outcomes of students in multiplication and division material and improve the learning process of learning
The study focused on the model of estimating the risk of exposure of workers to global occupational vibrations / with local action on the hand-arm system. In order to estimate the risk of exposure to ...occupational vibrations, we developed a generalized mathematical model for estimating the risk of exposure to mechanical vibrations transmitted to the whole body / with action on the hand-arm system. This model is based on the statistical function of probability with exponential decrease (Gumbel function), and its argument is expressed either by the values of the weighted acceleration parameter or in the form of exposure points.
Latar belakang dilakukannya penelitian yakni kurangnya hasil keterampilan bernalar kritis yang diperoleh peserta didik dalam pembelajaran matematika. Adapun solusi alternatif yang ditawarkan, yakni ...Realistic Mathematic Education (RME). Tujuan dalam penelitian yaitu sebagai upaya untuk melakukan peningkatan keterampilan siswa dalam bernalar kritis pada pembelajaran matematika melalui RME pada peserta didik kelas V SDN Kabupaten Temanggung, Indonesia. Metode yang digunakan dalam penelitian yaitu Action Research. Teknik pengumpulan melalui teknik pengamatan, catatan lapangan, metode test serta dokumen pendukung. Untuk mengetahui keabsahannya menggunakan triangulasi teknik. Peneliti menggunakan observasi dan tes untuk mendapatkan informasi dari sumber yang sama. Alat dalam penelitian yaitu pengujian keterampilan bernalar kritis, formulir observasi, serta saran untuk menganalisis data dengan menggunakan indikator berpikir kritis. Dari hasil analisis data dapat ditarik simpulan penggunaan RME dapat mengahsilkan peningkatan keterampilan bernalar kritis siswa dalam pembelajaran matematika. Hal tersebut terlihat dari tujuan yang mengukur keberhasilan setiap aspek solusi.
Development of ematics problem solving ability Meryannav Sabilah; Fitriana Yolanda
International journal of trends in mathematics education research,
06/2022, Volume:
5, Issue:
2
Journal Article
Peer reviewed
Open access
The aims of this study is to produce a mathematical learning device with a Problem Based Learning model oriented to mathematical problem-solving abilities on the subject matter of the size of the ...concentration and distribution of valid and practical data for class VIII SMPN 1 Rengat Barat. This research on the development of mathematics learning tools uses a 4-D model, namely: 1) Define, 2) Design, 3) Develop, and 4) Disseminate. The data collection instruments used were RPP validation questionnaire sheets and LKPD validation questionnaire sheets and practicality sheets. The data collection technique used was non-test with a questionnaire validation of learning devices. The analytical technique used is descriptive statistical analysis. From the results of the study, it was obtained that the average value of RPP validation was 88.73% with a very valid category, while the validation in terms of RPP aspects obtained an average value of 89.24% with a very valid category. The results of the analysis of the average validation of LKPD are 87.5% with a very valid validation level, while the validation in terms of aspects obtained an average value of 87.98% with a very valid category. The average practicality of learning tools obtained a value of 85.4% with very practical category. Based on this study, it was found that the mathematics learning device with the Problem Based Learning model oriented to mathematical problem-solving abilities on the subject matter of the size of concentration and data distribution of class VIII students of SMPN 1 Rengat Barat has been tested for validity and practicality.
•A novel PV-TE system was presented.•Mathematical model of the system was built.•Performance under different ambient conditions was analyzed.•New PV-TE and the conventional PV were ...compared.•Preliminary economic analysis was demonstrated.
Photovoltaic-thermoelectric (PV-TE) hybrid system is one typical electrical production based on the solar wide-band spectral absorption. However the PV-TE system appears to be economically unfeasible owing to the significantly higher cost and lower power output. In order to overcome this disadvantage, a novel PV-TE system based on the flat plate micro-channel heat pipe was proposed in this paper. The mathematic model was built and the performance under different ambient conditions was analyzed. In addition, the annual performance and the preliminary economic analysis of the new PV-TE system was also made to compare to the conventional PV system. The results showed that the new PV-TE has a higher electrical output and economic performance.
Modern technology offers many ways to enhance teaching and learning that in turn promote the development of tools for educational activities both inside and outside the classroom. Many educational ...programs using the augmented reality (AR) technology are being widely used to provide supplementary learning materials for students. This paper describes the potential and challenges of using GeoGebra AR in mathematical studies, whereby students can view 3D geometric objects for a better understanding of their structure, and verifies the feasibility of its use based on experimental results. The GeoGebra software can be used to draw geometric objects, and 3D geometric objects can be viewed using AR software or AR applications on mobile phones or computer tablets. These could provide some of the required materials for mathematical education at high schools or universities. The use of the GeoGebra application for education in Laos will be particularly discussed in this paper. Keywords: GeoGebra, Geometry, Mathematic, Learning Media, Augmented Reality
Mathematics is a subject that is full of challenges and practical tasks that students must be able to do, this of course must be in line with the availability of various appropriate and innovative ...learning tools and resources which can then be used by students to deepen the material. Through research that aims to develop an interactive multimedia, it is hoped that it can become one of the appropriate learning media for students to use. This type of research is a Research and Development (RnD) method that adopts a 4D development model (Define, Design, Develop, Disseminate), with a focus on extracting data on Development (D) which contains an assessment of the feasibility of media products, with data collection techniques, namely non- test through a questionnaire, accompanied by a questionnaire instrument validation sheet. The data will be analyzed descriptively using percentage conversion in order to describe the feasibility of multimedia products. The results show that interactive multimedia that has gone through an assessment process from each evaluator with details, namely the assessment of media experts 90.1%, material expert assessments 83.3%, linguistic experts assessment 98%, media developer assessments 89.9% and assessment of elementary school teachers 97%. Through the results of the assessment, it can be concluded that the product of innovation in the form of interactive multimedia for learning in elementary schools is included in the category suitable for use as learning media
•Different growth rates and variation exist across individuals’ academic achievement.•Children with higher early academic achievement showed faster increases over time.•Initial levels in executive ...function and approaches to learning affect achievement.•Growth rates in executive function and approaches to learning affect achievement.•Approaches to learning mediate the link between executive function and achievement.
For effective promotion of children’s learning and academic achievement, it is important to understand the role of and relationship between children’s cognitive and affective characteristics in their learning and academic achievement. The current study applied latent growth curve modeling to examine trajectories of children’s reading and math achievement, executive function (EF), and approaches to learning (ATLs) from kindergarten year to first grade. We also examined whether and the extent to which the initial levels and growth rate of EF and ATLs independently predicted the initial level and growth rate of reading and math achievement and whether the initial level and the growth rate of ATLs mediate in the relationships between EF and academic achievement. Results from a nationally representative and longitudinal sample of the Early Childhood Longitudinal Study-Kindergarten Cohort of 2011 indicated that children’s levels of reading and math achievement, EF, and ATLs significantly differ in the fall of kindergarten. Significant variances in rates of change of main variables over time suggest that some children showed faster increases than others in some variables, while others may have even shown decreases over time. Children with a higher level and faster growth rate in EF and ATLs showed a faster rate of change in reading and math achievement. Last, EF trajectories influence academic achievement trajectories directly and indirectly through ATL trajectories. Given that this study found an important role of children’s ATLs in academic achievement, we need to promote effective teaching practices and curricula to support students’ ATLs at each grade level in classrooms and schools, with particular attention to at-risk children.
The implementation of large-scale intervention and development projects is often problematic, and the impacts of such projects usually fall somewhat short of what was expected. Additionally, the ...rationalities of intervention projects are not carried over into classroom teaching as directly as expected. This problem is generally known, but comprehensive explanations continue to elude the research community at large. Using the theory of cultural-historical activity theory (CHAT), we propose that the heart of the problem lies in the
expansive learning process
that teachers undergo. This process is driven by unrecognised contradictions in terms of cultural and historical origin, which are fundamentally different from the processes governing the projects. We analyze two cases taken from two large Danish professional development projects. In each case, we focus on a teacher as part of two activity systems (‘the project’ and ‘the classroom’) and how the contradictions within and between these shape learning through epistemic actions. The results indicate the importance of making these contradictions apparent and accessible to everyone in the activity systems. Because of these various contradictions, the agency conferred upon teachers leads to unintended outcomes.
With the growing development in demand response, load serving entities (LSEs) may participate in electricity market as strategic bidders by offering coupon-based demand response (C-DR) programs to ...customers. However, due to customers' versatile electricity consumption patterns under C-DR programs as well as the increasing penetration of wind power generation, obtaining the deterministic bidding decision becomes unprecedented complex for LSEs. To address this challenge, a new strategic bidding model for an LSE is proposed in which the primary objective is to maximize the LSE's profit by providing optimal C-DR considering high wind power penetration. The proposed strategic bidding is a bi-level optimization problem with the LSE's net revenue maximization as the upper level problem and the ISO's economic dispatch (ED) for generation cost minimization as the lower level problem. This bi-level model is converted to a stochastic mathematic program with equilibrium constraints (MPEC) by recasting the lower level problem as its Karush-Kuhn-Tucher (KKT) optimality conditions. Then, the stochastic MPEC is transformed to a mixed-integer linear programming (MILP) problem, which is solvable using available optimization software, based on strong duality theory. In addition, the effectiveness of the proposed method has been verified with simulation studies of two sample systems.
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