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TINGKAT PEMAHAMAN MAHASISWA PENDIDIKAN KIMIA PADA BEBERAPA KONSEP DASAR MATEMATIK YANG DIBUTUHKAN UNTUK KELANCARAN BELAJAR KIMIA KUANTITATIF Fahyuddin, Fahyuddin; Liliasari, Liliasari; Sabandar, Jozua
JPPS (Jurnal Penelitian Pendidikan Sains) Vol 2, No 1 (2012)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpps.v2n1.p147-153

Abstract

This study explores the basic mathematics abilities of pre-service chemistry students in the specific area of mathematics that consists of four sections, on logarithms, scientific notation , algebra, and graphs. The results of this study were used to develop content lecture of chemistry mathematics course in both chemistry education curriculum and science of chemistry. The participants were 150 students that consists of three level, one level, two, and three, each of 50 respondents. The basics mathematics ab ilities of three level chemistry students were compared with each other. The questions were used in this descriptive study are all multiple choice that developed based on four mathematics concept and related with the needs of chemistry students. The results ind icated that were not significantly differents in mathematics abilities among the tree level of students. Student achievements in basic mathematics consists of logarithms, scientific notation, algebra, and graphs wer, dan respectively. The mathematics concepts that are still difficult to understanding for students were algebra manipulation, transformation of mathematics equation from exponensial to logarithm equation, and understanding of graphs both exponensia l and logarithm equation.Penelitian ini mengeksplorasi kemampuan matematika dasar mahasiswa pendidikan kimia pada konsep logaritma, notasi saintifik, aljabar dasar, dan grafik. Hasil studi digunakan sebagai dasar untuk pengembangan bahan ajar mata kuliah matematika kimia pada kurikulum pendidikan kimia dan jurusan kimia. Sampel penelitian adalah 150 mahasiswa yang terdiri atas tiga tingkatan, yaitu tingkat 1, 2, dan 3 yang masing-masing 50 orang. Kemampuan konsep dasar matematik dari tiga tingkatan akan diperbandingan satu sama lain. Instrumen yang digunakan pada metode deskriptif ini berupa tes pilihan ganda yang dikembangkan berdasarkan konsep matematika yang diukur dan relevan dengan kebutuhan mahasiswa kimia. Hasil analisis menunjukkan bahwa perbandingan kemampuan dasar matematik antara tiga tingkatan mahasiswa tidak memberikan perbedaan yang signifikant pada sejumlah konsep matematik yang bersesuaian dan nilai total. Untuk itu, kemampuan mahasiswa pendidikan kimia secara rata-rata pada konsep logaritma, notasi saintifik, aljabar, dan grafik berturut-turut adalah 58,6; 66,3; 51,2; dan 32,8. Konsep dasar matematik yang masih sukar dipahami adalah mengubah bentuk persamaan eksponensial ke bentuk logoritma, distribusi persamaan logaritma, hukum dasar aljabar, aritmetika bilangan dalam notasi saintifik, grafik persamaan eksponensial, dan grafik persamaan logaritma.
The Effect of Electronic Portfolio Assessment Model to Increase of Students’ Generic Science Skills in Practical Inorganic Chemistry Ramlawati, Ramlawati; Liliasari, Liliasari; Martoprawiro, Muhamad Abdulkadir; Wulan, Ana Ratna
Journal of Education and Learning Vol 8, No 3: August 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.077 KB)

Abstract

Electronic portfolio assessment (EPA) is an assessment procedure based assessment for learning which is a collection of student work collected digitally. The purpose of this research was to determine the effect of implementation of the EPA model to increase students’ generic science skills (GSS) in Practical Inorganic Chemistry. Research was conducted at Chemistry Education Department on preservice teacher programme. The research design was a Pretest-Posttest Control Group Design. Research subjects each consisted of 30 students in the experimental and control Group. Data was collected using GSS test given at pretest and posttest. Data were analyzed by SPSS version 17.0. The result show that students who used EPA model in the assessment process have increased GSS (mean of N-gain= 0.41) better than those used conventional portfolio assessment (mean of N-gain = 0.14).
PENGEMBANGAN KETERAMPILAN BERPIKIR KRITIS SISWA SMA PADA TOPIK TEORI DOMAIN ELEKTRON MELALUI SIMULASI INTERAKTIF PhET MOLECULE SHAPES Stiawan, Elva; Liliasari, Liliasari; Rohman, Ijang
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 19, No 2 (2014): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v19i2.468

Abstract

Tujuan dari penelitian dengan judul “Pengembangan Keterampilan Berpikir Kritis Siswa SMA pada Topik Teori Domain Elektron melalui Simulasi Interaktif PhET Molecule Shapes” dilakukan untuk meningkatkan keterampilan berpikir kritis siswa SMA melalui penggunaan simulasi interaktif PhET MS versi 1.05 pada topik teori domain elektron. Metode penelitian yang digunakan adalah quasi experiment. Subyek penelitian terdiri atas 64 siswa kelas X IPA di salah satu SMA Negeri di Kota Bandung. Data yang diperoleh berupa hasil tes tertulis dan angket terhadap siswa, serta hasil wawancara terhadap guru kimia. Analisis data penelitian dilakukan melalui uji statistik menggunakan independent-sample t-test atau Uji Mann-Whitney dengan taraf kepercayaan 95%. Hasil analisis signifikansi menunjukkan bahwa PhET MS dapat meningkatkan penguasaan sebagian indikator keterampilan berpikir kritis. Peningkatan keterampilan berpikir kritis siswa terjadi pada indikator membuat induksi dan mempertimbangkan hasil induksi (N-gain: 45,54 %), serta menganalisis argumen (N-gain: 57,03 %). Baik guru maupun siswa memberikan tanggapan yang positif mengenai penggunaan PhET MS dalam pembelajaran.Kata kunci:   keterampilan berpikir kritis, PhET Molecule Shapes, teori domain elektron, simulasi interaktif
PROFIL MOTIVASI BELAJAR MAHASISWA CALON GURU KIMIA DAN KORELASINYA TERHADAP MODEL MENTAL Wiji, Wiji; Liliasari, Liliasari; Sopandi, Wahyu; Martoprawiro, Muhammad A. K.
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 19, No 2 (2014): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v19i2.465

Abstract

Tujuan penelitian ini adalah untuk mengetahui profil motivasi belajar Mahasiswa Calon Guru Kimia (MCGK) tingkat I sampai dengan tingkat IV. Selain itu, juga dikaji korelasi antara motivasi dengan model mental kimia sekolah. Penelitian dilakukan menggunakan metode kuantitatif non eksperimen, dengan desain survei lintas-bagian (cross-sectional survey) dan melibatkan 124 mahasiswa calon guru kimia di jurusan Pendidikan Kimia pada salah satu Universitas di Bandung. Data dikumpulkan melalui Kuesioner Motivasi Belajar Kimia (KMBK) dan Tes Diagnostik Model Mental Kimia Sekolah (TDMKS). Hasil analisis deskriptif menunjukkan motivasi belajar MCGK pada kategori rendah untuk tingkat I (M=3,04; SD=0,24) dan kategori sedang untuk tingkat II (M=3,56; SD=0,20), tingkat III (M=3,78; SD=0,26), dan tingkat IV (M=3,89; SD=0,25). Hasil uji Kruskal Wallis menunjukkan adanya perbedaan secara signifikan pada sebagian besar jenis motivasi belajar MCGK berdasarkan tingkat kelas, kecuali jenis target prestasi. Motivasi belajar MCGK berkorelasi pada tingkat sedang dengan model mental kimia sekolah (r=0,399; p<0,01).Kata kunci : motivasi belajar, model mental, kimia sekolah, tes diagnostik
THE STUDY OF MENTAL MODEL ON N-HEXANE-METHANOL BINARY SYSTEM (THE VALIDATION OF PHYSICAL CHEMISTRY PRACTICUM PROCEDURE) Albaiti, Albaiti; Liliasari, Liliasari; Sumarna, Omay
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5783

Abstract

N-hexane and methanol systen is one example of a binary system that shows the solubility properties of reciprocity. This study aimed to assess the mental model of a n-hexane-methanolbinary system. Interaction at the submicroscopic level between n-hexane and methanol molecules is described in the form of mental model. Penelitian ini menggunakan cloud point method untuk memperoleh data kesetimbangan cair-cair sistem n-heksana-metanol. This study used a cloud point method to obtain data on liquid-liquid equilibrium on the system of n-hexane-methanol. Research data showed the maximum critical temperature (above the consolute temperature) of this system was at 42.95 °C with Xmethanol = 0.475 (P= 715 mmHg). Data from the laboratory observations was representedas a symbolic level in the form of the curve of correlation between mole fraction of methanol with temperature in a phase diagram system of n-hexane-methanol. The curve that was formed was asymmetric. It indicated that the solubility of n-hexane in methanol was relatively small compared to the solubility of methanol in n-hexane. Mental model of the binary system of n-hexane-methanol in four curve areasin the form of visualization of the interaction between n-hexane and methanol molecules through London force. In thermodynamics, each component had the same chemical potential inboth phases at equilibrium state. This study results could have a contribution to form a mental model on the student as the prospective chemistry subject teachers.
IMPROVING STUDENTS’ GENERIC SKILL IN SCIENCE THROUGH CHEMISTRY LEARNING USING ICT-BASED MEDIA ON REACTION RATE AND OSMOTIC PRESSURE MATERIAL Mulyani, S.; Liliasari, Liliasari; Wiji, Wiji; Hana, M. N.; Nursa’adah, E.
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5804

Abstract

The research aims to obtain information of improvement students’ generic skills in science through chemistry learning using ICT-based media on reaction rate and osmotic pressure material. This research was designed with quasi-experimental research method, with the design of non-equivalent control group pretest-posttest design. The research subjects were students of class XI and XII one of Madrasah Aliyah Negeri (State Islamic Senior High School) in Bandung. Learning process in experiment group were conducted using ICT-based media, whereas in control group conducted by applying laboratory activities. Data were collected through multiple-choice test. The result shows that there was no significant difference of n- gain of students’ generic skill in science between experiment and control group. Therefore it can be concluded that the learning process using ICT-based media can improve students generic skills in science as well as laboratory-based activities.
Pelatihan Guru IPA dalam Mendesain Instruksional Ilmu Pengetahuan Bumi dan Antariksa (IPBA) untuk Meningkatkan Keterampilan Berpikir Kritis Siswa SMP Marlina, Leni; Liliasari, Liliasari; Tjasyono, Bayong; Hendayana, Sumar
Seminar Nasional Pendidikan IPA Vol 1 (2017)
Publisher : Seminar Nasional Pendidikan IPA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan melatih guru IPA SMP dalam menyusun desain instruksional Ilmu Pengetahuan Bumi dan Antariksa (IPBA) dan meningkatkan keterampilan berpikir kritis (KBK) siswa. Penelitian ini merupakan penelitian Quantitative method. Subjek penelitian 24 Guru IPA SMP dan 193 siswa kelas VII dari beberapa SMP Negeri di Kota Palembang Sumatera Selatan tahun ajaran 2016/2017 yang dipilih dengan menggunakan teknik purposive sampling. Instrumen penelitian yang digunakan dalam penelitian ini adalah tes keterampilan berpikir kritis materi struktur bumi dan bencana yang digunakan untuk mengukur penguasaan keterampilan berpikir kritis siswa. Teknik analisis data menggunakan uji normalitas, uji homogenitas, dan N-gain. Dari hasil skor pre tes diperoleh 37,34 pos tes 48,18 dan N-gain 0,168. Dari hasil penelitian ini terdapat peningkatan keterampilan berpikir kritis siswa.
The Design of Media on Two-Lens System Experiment (MTLSE) for Pre-service Physics Teachers Saprudin, Saprudin; Liliasari, Liliasari; Prihatmanto, Ary Setijadi; Setiawan, Andhy
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 4 No 2 (2018): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 4 Issue 2,
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/1.04206

Abstract

This article is a part of the research in designing a model of the geometrical-optics game on optics' courses for pre-service physics teachers (PPTs). This article describes the preliminary form of product, the result of validation, and PPTs’ responses to the media on two-lens system experiment (MTLSE). The validation of this media has been done according to physics subject matter, instructional media and pedagogical experts. The implementation of MTLSE using the one-shot case study design involving 25 PPTs at one of the Islamic universities in Bandung. We collected the data of MTLSE validation and PPTs’ responses through non-test techniques with questionnaire instruments. The data using quantitative descriptive analysis technique. The results of MTLSE validation can be good categorized. Besides, generally, the PPTs’ responses are good categorized toward the implementation of MTLSE on optics' courses.
PRE-SERVICE SCIENCE TEACHERS’ READINESS TO INTEGRATE TECHNOLOGY (AN EXPLORATION TOWARD TPACK IN PRELIMINARY PRACTICAL CONTEXT) Agustin, Rika Rafikah; Liliasari, Liliasari
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 21, No 2 (2016): Jurnal Pengajaran MIPA - Oktober 2016
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v21i2.830

Abstract

The purpose of this study was to capture pre-service science teachers’ Technological Pedagogical Content Knowledge (TPACK) that is demonstrated during preliminary practical context in term of peer teaching program- a course conducted prior to teaching practice. Ten pre-service science teachers were involved in a semester long peer teaching program. Descriptive method was employed with the use of teaching artifacts, observation and self-reported survey for representing the way the participant integrate technology into their teaching. TPACK constructs were defined using relevant literature as frameworks. This study found that TPACK of  pre-service science teachers were still low and is not sufficient for teaching science in junior high school. Furthermore, it is needed several supporting program to prepare pre-service science teachers’ competencies in teaching science with technology. In this case, more sophisticated peer teaching program with better purchase is necessity to improve TPACK competencies of pre-service science teachers.
EKSPERIMEN KINETIKA ENZIM MENGGUNAKAN MODEL INKUIRI TERBIMBING UNTUK MENINGKATKAN KETRAMPILAN BERPIKIR KREATIF MAHASISWA Amida, Nadia; Supriyanti, F.M. Titin; Liliasari, Liliasari
Alotrop Vol 2, No 1 (2018)
Publisher : FKIP University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

[EXPERIMENT OF ENZYME KINETICS USING GUIDED INQUIRY MODEL FOR ENHANCING CREATIVE THINGKING SKILLS] Purpose of this study was enhancing creative thinking skills of students using guided inquiry model through experiments of enzyme kinetics based on local materials. Method of this research was quasi-experimental methods, with pretest-posttest nonequivalent control group design. Subjects of this study were chemistry students enrolled in biochemistry lab course, consisted of 18 students in the experimental class and 19 students in control class. Instrument in this study were essay test that involves 3 indikators of creative thinking  skills (i.e. fluency, flexibility, and elaboration) and also student worksheets. The results showed that the experiments of kinetics enzyme  using guided inquiry model have been enhance creative thinking skills in medium category with a value of N-gain average of 0.66. Two indikators classified in the high category are fluency and elaborationwith the value of N-gain 0,71. Meanwhile, indikator of flexibility in the medium category with a value of N-gain 0,56.