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Amrul Bahar
FKIP Universitas Bengkulu
Chemistry Education

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PENERAPAN MODEL PEMBELAJARAN TIME TOKEN UNTUK MENINGKATKAN KEMAMPUAN BERTANYA DAN HASIL BELAJAR KIMIA SISWA KELAS X MIPA 1 SMAN 09 KOTA BENGKULU TAHUN AJARAN 2017/2018 Ufi Damayanti; Amrul Bahar; Salastri Rohiat
ALOTROP Vol 4, No 1 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i1.13693

Abstract

Research the act of this class carried out of date 01 February 2018 – 08 March 2018aims to (1) enhance the capacity of ask a student to lose their; (2) increase yields of of students to study, declaration of relinquishing his her to see liveliness of teachers and students in the process of learning to promote disorder to. A subject in this research is a student X MIPA 1 SMAN 09 city Bengkulu school year 2017/2018 on the subject of redox reactions, which amounted to 28 students. The research results show that the implementation of learning cooperative type time token can improve the ability ask students, improve learning outcomes students, and improving liveliness teachers and students in learning in subject matter reaction redoks the result of which have be completed in cycle 3rd. On the ability of cycle I ask students 75 % rate of C1, 15 % rate of C2, 10 % rate of C3 and 28,57 % student learning. Cycle II ask students 65,22 % rate of C1, 21,74 % rate of C2, 13.04 % rate of C3 with 64,29 % student learning. The cycle III ask student 4,35 % rate of C1, 78,26 % rate of C2, and 17,39 % rate of C3, with 89,29 % student learning (who has achieved indicators of the quality of the success of research and KKM). To liveliness teachers from the cycle I, II, and III each 25, 27, and 30, while liveliness students in each 21, 24, and 28
PERBANDINGAN MODEL PEMBELAJARAN PROBLEM SOLVING DAN PROBLEM BASED LEARNING TERHADAP KEMAMPUAN BERPIKIR KRITIS SISWA KELAS XI MIA MAN 2 KOTA BENGKULU Ida Nurjelita Sani; Amrul Bahar; Elvinawati Elvinawati
ALOTROP Vol 4, No 2 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i2.13834

Abstract

The aim of this study to determine the comparison of Problem Solving (PS) and Problem Based Learning (PBL) models to critical thinking skills of student on buffer solution material. This type of research is quasi experimental research with posttest only control group design research design. The population of this study is all class XI IPA of MAN 2 Bengkulu City academic year 2018/2019 as many 133 students. The analysis of the data was used the normality test,  homogeneity test, and hypothesis test.  The research sample was taken by purposive sampling technique. Data on the results of students' critical thinking skills are obtained from the value of the posttest or final test. Posttest is done by using test instruments in the form of descriptive tests as many as 6 items, each of which has a different critical thinking indicator. Previous test instruments were tested and analyzed to see the level of validity, reliability, differentiation and the level of difficulty of the questions. The results of the study showed that the average value of students' critical thinking ability achievement in the experimental class 1 was higher than that of the experimental class 2 students which were 74.09 and 70.22. Based on these results, the experimental class 1 which applied the problem solving learning model was better at improving students' thinking skills than the experimental class 2 which applied a problem-based learning model. Hypothesis testing with the T-test at the 0.05 significance level yields a sig value. (2-tailed)> level of signicant which is 0.147> 0.05 so that Ho is accepted. Thus, it can be concluded that there is no significant difference between the critical thinking skills of the experimental class 1 students who apply PS models and experimental class 2 students who apply the PBL model.
ANALISIS MISKONSEPSI SISWA PADA MATERI KONSEP REDOKS MENGGUNAKAN CERTAINTY OF RESPONSE INDEX (CRI) DI SMA NEGERI 9 KOTA BENGKULU Endah Yuniarti; Amrul Bahar; Elvinawati Elvinawati
ALOTROP Vol 4, No 1 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i1.13714

Abstract

This research aimed to describe the student misconceptions and find out the cause of misconceptions on Redox Reaction lesson at the tenth grade of Senior High School 9 Bengkulu in 2018/2019 Academic Year. Research conduct on April 15th until May 24th, 2019. The design of this research is descriptive method. The samples were taken through simple random sampling technique are 67 students of tenth grade MIPA SMA N 9 Kota Bengkulu so that 30 students were sampled. Essay test by Certainty of Response Index (CRI) and interview were used as the instruments of this research. Based on the analysis of research data shows there are misconceptions students. The analysis results show that misconceptions occurred at all sub concept on redox concept so the percentage of misconceptions that occur amounted to 35,7% in the overall student. The results showed the highest percentage of misconceptions in the amount of 46% at sub concept to determine reduction oxidation based on oxidation number on molecules and ion. The lowest percentage of misconceptions in the amount of 23% at indicator to in the sub concept of understanding oxidation and reduction in a redox reaction in terms of changes in oxidation number. Based on the results of interviews, causes of student misconception are derived from internal and external factors. Internal factors are derived from students such as students' associative thinking, student apperception and wrong intuition, students' abilities are lacking, low of students' motivation and learning interests during the learning process, students' learning methods, and students' selfconfidence in CRI values and external factors such as methods learning and limited learning resources.
Co-Authors Elvinawati Elvinawati Endah Yuniarti Ida Nurjelita Sani Salastri Rohiat Ufi Damayanti