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Agus Muliaman
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ANALISIS KESALAHAN MAHASISWA DALAM MENYELESAIKAN SOAL IKATAN KIMIA Mellyzar Mellyzar; Agus Muliaman
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.6420

Abstract

Chemical bonding is an important topic in chemistry. The chemistry students have to expert on the topic. Due to the importance of chemical bonding topic, qualitative descriptive research was conducted to analyze the students' errors in solving the chemical bond problems. The participants were 38 students of the third semester of Chemistry Education Department in one of the universities in Aceh, Indonesia. The result showed that the percentage of the students’ errors in solving the chemical bonds problems was high with an average of 69.08%, it means that the students’ ability in understanding chemical bond concepts is still low. This research concludes two things. First, the types of errors in solving chemical bonds problems are the students’ error in understanding the basic concepts of chemical bonds, lack of understanding of the concept how an element has a stable electron configuration, the mechanism of the difference in the forming of ion bonds and covalent bonds, the influence of geometric figures, the resultant molecular dipole moments, the number of electronegativity to molecular pollutants, the writing of a Lewis structure for molecules and polyatomic ions, the determining of the formal contents of each atom of a Lewis molecular structure, and the drawing of the Lewis structure. Second, the causes of students’ errors have forgotten the materials and also pre-requisite materials and inaccurate in reading and solving the problems. These results need to be considered in the learning process in order to improve students’ ability in solving chemical bond problems.
Pengaruh Model Contextual Teaching and Learning (CTL) Terhadap Hasil Belajar dan Efikasi Diri Peserta Didik Pada Materi Minyak Bumi Agus Muliaman; Ratna Unaida; Putri Ayu Adurance Simanullang
Jurnal Ilmiah Wahana Pendidikan Vol 8 No 11 (2022): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.298 KB) | DOI: 10.5281/zenodo.6831321

Abstract

This study aims to determine the effect of the contextual teaching and learning model on learning outcomes and students' self-efficacy on petroleum material. The type of research used is a quasi-experimental/quasi-experimental design with a posttest only control group design. The population in this study were all students of class XI SMA Negeri 1 Sawang, while the samples were two classes, namely class XI IPA 1 as the experimental class and class XI IPA 2 as the control class. The data collection instruments in this study were multiple choice tests and self-efficacy questionnaires which were given after the learning treatment for two classes. Testing the data using a non-parametric test assisted by SPSS 18 software. Based on the results of the non-parametric mann-whitney-utest test, it was obtained that it was significant 0.000 < sig level (α = 0.05) this means that H0 is rejected. The results showed that there was an influence of the contextual teaching and learning model on learning outcomes and students' self-efficacy on petroleum material.
Implementasi Model PjBL Berbasis STEM Terhadap Kreativitas Siswa pada Materi Larutan Elektrolit dan Nonelektrolit di MAN Kota Lhokseumawe Coryna Oktaviani; Agus Muliaman; Evi Listiani
Jurnal Ilmiah Wahana Pendidikan Vol 8 No 12 (2022): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.254 KB) | DOI: 10.5281/zenodo.6943331

Abstract

The learning process currently taking place in schools focuses more on improving cognitive aspects, but does not pay more attention to skills aspects, especially student creativity. This study aims to describe students' creativity through the implementation of the PjBL (Project Based Learning) model based on STEM (Science, Technology, Engineering and Mathematics) on electrolyte and non-electrolyte solutions. This research was conducted in MAN Kota Lhokseumawe with sample selection by purposive sampling, namely class X MIA 5 totaling 30 students. This research uses a qualitative approach with descriptive research type. Data were obtained using student creativity assessment sheets. The results showed that the average score of students was 77% with very creative criteria, this was obtained based on the assessments made by the observer in each group. The group is selected heterogeneously, that is, students are grouped based on the mix of their ability to score. The conclusion of the results of this study is that applying the STEM-based PjBL learning model can develop students' creative ideas in the teaching and learning process
Co-Authors Coryna Oktaviani Evi Listiani Mellyzar, Mellyzar Putri Ayu Adurance Simanullang Ratna Unaida, Ratna