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The Impacts of Chemopoly-Edutainment to Learning Activities and Responses Sri Adelila Sari; Jasmidi Jasmidi; Agus Kembaren; Ajat Sudrajat
Journal of Education and Learning (EduLearn) Vol 12, No 2: May 2018
Publisher : Intelektual Pustaka Media Utama

The purpose of this study was to alleviate the problem of student learning activities through the use of innovative chemistry learning media, namely chemopoly-edutainment. This type of research was a pre-experimental study. The approach used was descriptive qualitative approach. This research has been done in Medan State University in 2017 year. The selection of research subjects was done by purposive sampling, i.e., Chemistry Department students as many as 36 people. Data were collected using observation sheet to measure learning activities. Then, students' responses were measured using a questionnaire. The results showed that learning about chemicals separation by using chemopoly-edutainment media could help students to be more active in learning. The activeness of students in the highly active category was found at 77.16 percent. While active students learn was reached 20.68 percent. In addition, found as many as 2.16 percent of students who were quite active. The study also found that none of the students were less active or inactive in teaching and learning activities using the chemopoly-edutainment medium. The students’ responses to the use of chemopoly-eudtainment media on chemical separation learning was also found to be positive.

Pengembangan Lembar Kerja Siswa Inovatif Berbasis Problem Based Learning Dalam Pembelajaran Konsep Materi Kimia Reaksi Reduksi Dan Oksidasi Pada Siswa SMA Indira Lukman; Agus Kembaren; Mariani Damanik
SEMINAR NASIONAL PENINGKATAN MUTU PENDIDIKAN Vol. 1 No. 1 (2020): Seminar Nasional Peningkatan Mutu Pendidikan
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Samudra

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

Tujuan dari penelitian ini adalah mengembangkan, menstandarisasi, dan mengujicobakan Lembar Kerja Siswa (LKS) Kimia Inovatif serta mengetahui perbedaan hasil belajar siswa. Komponen penilaian terdiri dari kelayakan isi, kelayakan bahasa, kelayakan penyajian, dan kelayakan kegrafikaan. Populasi dalam penelitian ini adalah seluruh siswa kelas X SMA Dharma Pancasila Medan yang terdiri atas 5 kelas. Sampel penelitian diambil secara random sampling yaitu sebanyak 2 kelas. Ujicoba telah dilakukan dengan pemberian pretest, pengajaran dengan menggunakan LKS Inovatif sebagai media di kelas eksperimen, dan penggunaan LKS Kimia yang sudah ada di kelas kontrol serta kedua kelas telah diberikan posttest di akhir pembelajaran. Data perbedaan hasil belajar dianalisis dengan uji t. Hasil yang didapat menunjukkan bahwa LKS Inovatif memiliki rata-rata 3,75 pada kelayakan isi; 3,79 pada kelayakan bahasa; 3,64 pada kelayakan penyajian; dan pada kelayakan kegrafikaan 3,40. Persentase peningkatan hasil belajar siswa pada kelas eksperimen adalah 74,18% sedangkan untuk kelas kontrol adalah 56,42%. Hasil uji statistik berdasarkan perhitungan uji hipotesis thitung 6,761 > ttabel 1,670, sehingga dapat disimpulkan bahwa Hasil belajar kimia siswa yang diajarkan mrenggunakan LKS Inovatif pada materi Reaksi Reduksi dan Oksidasi lebih tinggi daripada hasil belajar kimia siswa yang diajarkan dengan LKS yang sudah ada.

IKAN HIAS UNTUK DESA SEKIP LUBUK PAKAM Rita Juliani; Derlina Nasution; Agus Kembaren
JURNAL PENGABDIAN KEPADA MASYARAKAT Vol 20, No 77 (2014)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkm.v20i77.3427

Telah dilakukan Ipteks bagi Masyarakat (IbM) di Lubuk Pakam yang bertujuan terbentuknya kelompok tani professional ikan hias yang menghasilkan bibit dan ikan hias dengan kuantitas memadai serta memiliki kualitas yang tinggi. Metode yang digunakan adalah melalui metode pelatihan (workshop). Workshop dilakukan dalam beberapa tahap yakni: (a). penyuluhan dan pelatihan usaha tani budidaya ikan hias; (b) pelatihan pembuatan pembukuan pemeliharaan ikan hias dan (c) budidaya ikan hias oleh kelompok tani dengan pembuatan kolam. Hasil yang diperoleh dengan diadakannya penyuluhan dan pelatihan serta pembudidayaan ikan hias, kelompok tani menjadi lebih terlatih dalam budidaya ikan hias dan selektif dalam memenejemenkan keuangan. Budidaya ikan hias yang dilakukan dengan penambahan kolam diperoleh hasil panen ikan hias dengan warna yang lebih cerah dan tingkat kematian yang rendah. Hasil panen dengan di masukan bibit 290.000 ekor terdiri dari 1500 ekor ikan koi dan 1400 ekor ikan koki diperoleh tingkat kehidupan ikan koi 90 % dan ikan koki 80 % dengan kualitas A,B dan C sisanya kurang berkualitas (BS). Hasil kualitas A sekitar 10 %, B 20 % dan C 20%.

The development paired cards using problem based learning on student competency Ramadhani Putri Lestari; Marini Damanik; Agus Kembaren
Jurnal Pendidikan Kimia (JPKim) Vol 11, No 3 (2019): December
Publisher : Pascasarjana Universitas Negeri Medan

This study discusses development of paired cards using problem based learning model on learning outcomes and students critical thinking skills on the oxidation reduction reactions. This study aims to find out learning outcomes and critical thinking students who taught with problem based learning model using paired cards. The populations were all students of class X MIA in High School, which consists of eight classes with a total number of students 296 students. The sample was taken by random sampling techniques is experimental class and control class. Students in experimental class were taught using problem based learning model, while control class were taught using direct instruction model. The results showed that average for the student learning outcomes 75.16 for experimental class and 70.63 for control class. The average students critical thinking skills were 40.17% for experimental class and 31.49% for control class. The student learning outcomes and critical thinking skills use problem based learning models with paired card was higher than the direct instruction model on the reduction oxidation reaction. There is a positive correlation between learning outcomes and students critical thinking skills.Keywords: Paired cards; problem based learning; oxidation reduction reaction

VALIDASI METODE PENENTUAN SAKARIN MENGGUNAKAN KROMATOGRAFI CAIR KINERJA TINGGI Agus Kembaren; Tiasina Harahap
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This research was aimed to validation analytical method of Saccarine and to determine saccarine consentration in soft drink High Performance Liquid Chromatography. Sodium Saccarine salts are used as standard. Sodium Saccarine salts dissolve in mobile phase methanol : fosfat buffer (60:40). Concentration of standard saccarine solution made in 20, 40, 60, 80, and 100 ppm. HPLC Agilent Technology 1260 Infinitely Series, Poroshell/C18 column- 50 mm lenght- id 4.6 mm - particles size 2.7 µm, UV-detector in λ 265 nm, injection volume 20 µL , and flow rate 1 mL/minutes were used in this research. Method validation parameters were determined by linierity, precision, accuracy, LOD, LOQ, and selectivity. The results show that lineariy with R = 0.998702, precision with RSD = 0.192%, accuracy with % recovery = 100.26%, LOD = 0.172 ppm, LOQ = 0.573, and selectivity with Rs = 0.2. Testing for the ‘Sprite Zero’ soft drink show that 117.6 mg/kg saccarine (under the maximum content in carbonated/noncarbonated soft drink). Conclution from this research is, HPLC method can use in analysis saccarine content in soft drink Kata kunci: metode penentuan, sakarin, kromatografi kinerja tinggi

PEMBUATAN ELEKTRODA SELEKTIF ION Cr (VI) DENGAN MENGGUNAKAN MEMBRAN KITOSAN Agus Kembaren; Roita T.T Panggabean
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 1 (2014): April
Publisher : Pascasarjana Universitas Negeri Medan

Abstract This research was aimed to make and to determine analytical performance of Cr (VI) ISE. The electrodes has made by mixing Chitosan(as electroactive), PVC (as matrix), and DBP (as plasticizer) in THF. Composition of PVC and DBP maintane in fix ratio, 1: 2, while the chitosan varried, 4%, 7%, 10%, 13% and 16%. The composite membrans soak into 1M K2Cr2O7 solution for the night, then tight on the tip of electrode body. Analytical performance of the electrodes were determined by nersnt factor and dynamic range, response time, selectifity coeficient, and life time. The results show that the electrodes with composition 4 % chitosan, 32 % DBP, and 64 % PVC have optimum performance. Dynamic range of this electrodes is between 10-5 M - 10-1 M , slope/nersnt factor 32.004 mv/decade, average response time 20.7 seconds. The electrodes are not interfered by Mn2+, Zn2+ and Fe3+. The electrodes can used with good performance in 3 days. Kata kunci : Elektroda selektif ion, membran kitosan

Penerapan model problem based learning (PBL) berbantuan media iSpring pada materi larutan elektrolit dan non elektrolit Feronica Felentina; Agus Kembaren
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 12 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i12.173

This study aims to determine the average learning outcomes and learning motivation with the iSpring Media Assisted Problem Based Learning (PBL) learning model compared to conventional learning models. This research was conducted at SMA Negeri 1 Sunggal with the samples in this study were 2 classes, namely the experimental class in class X IPA 2 and the control class in class X IPA 3 which were obtained using purposive sampling technique. The research instrument consisted of a test instrument in the form of validated questions and a non-test instrument in the form of a learning motivation questionnaire. The results of the study for learning motivation using the independent sample t-test at = 0.05, the tcount value was 1.81. The results of the study on learning outcomes showed that the average value with the Problem Based Learning (PBL) learning model was 84.58 while the average value in the conventional learning model was 77.50. The gain calculation shows that the increase in learning outcomes in the experimental class is 72% with criteria while the control class is 68% with moderate criteria. From the results of the study, it was obtained that the tcount value was 4.94 Ha, which was accepted, namely the learning outcomes of students who were taught with the Problem Based Learning learning model assisted by the Ispring media were higher than the learning outcomes of students who were taught using conventional learning models on electrolyte and non electrolyte solutions. While the research results for the correlation test is 0.333. Thus, there is a significant correlation between learning motivation to increase student learning outcomes in the experimental class by 11%. This shows that the higher the motivation, the higher the learning outcomes, and vice versa.

Penerapan model problem based learning (PBL) berbantuan media iSpring pada materi larutan elektrolit dan non elektrolit Felentina, Feronica; Agus Kembaren
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 12 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i12.173

This study aims to determine the average learning outcomes and learning motivation with the iSpring Media Assisted Problem Based Learning (PBL) learning model compared to conventional learning models. This research was conducted at SMA Negeri 1 Sunggal with the samples in this study were 2 classes, namely the experimental class in class X IPA 2 and the control class in class X IPA 3 which were obtained using purposive sampling technique. The research instrument consisted of a test instrument in the form of validated questions and a non-test instrument in the form of a learning motivation questionnaire. The results of the study for learning motivation using the independent sample t-test at = 0.05, the tcount value was 1.81. The results of the study on learning outcomes showed that the average value with the Problem Based Learning (PBL) learning model was 84.58 while the average value in the conventional learning model was 77.50. The gain calculation shows that the increase in learning outcomes in the experimental class is 72% with criteria while the control class is 68% with moderate criteria. From the results of the study, it was obtained that the tcount value was 4.94 Ha, which was accepted, namely the learning outcomes of students who were taught with the Problem Based Learning learning model assisted by the Ispring media were higher than the learning outcomes of students who were taught using conventional learning models on electrolyte and non electrolyte solutions. While the research results for the correlation test is 0.333. Thus, there is a significant correlation between learning motivation to increase student learning outcomes in the experimental class by 11%. This shows that the higher the motivation, the higher the learning outcomes, and vice versa.

Pengaruh Strategi Pembelajaran Everyone Is A Teacher Here (ETH) Terhadap Peningkatan Hasil Dan Motivasi Belajar Kimia Siswa Pada Materi Laju Reaksi Jeni Tamba; Agus Kembaren
Jurnal Yudistira : Publikasi Riset Ilmu Pendidikan dan Bahasa Vol. 2 No. 2 (2024): April : Jurnal Yudistira : Publikasi Riset Ilmu Pendidikan dan Bahasa
Publisher : Asosiasi Riset Ilmu Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/yudistira.v2i2.695

The low learning outcomes and student learning motivation are influenced by learning activities that are less innovative so that students feel bored and bored. The purpose of this study was to improve student learning outcomes and motivation by implementing the Everyone Is A Teacher Here (ETH) learning strategy. The type of research used is experimental research. The population of this study were all students of class XI IPA at SMA Negeri 1 Dolok Batu Nanggar. A sample of 2 classes was selected using a purposive sampling technique which served as the experimental class and the control class. The data analysis technique used the one-sided t-test, namely the right-hand t-test. The results and discussions that have been carried out show that there is an increase in student learning outcomes and motivation in classes that apply ETH learning strategies, this is evidenced in testing learning outcomes, obtained tcount = 14.3 and ttable = 1.67 (α = 0.05) so that tcount > ttable, then Ha is accepted and the N-gain is 0.71 (high category). Meanwhile, in testing student learning motivation, tcount = 7.95 and ttable = 1.67 (α = 0.05), so tcount > ttable, then Ha is accepted and N-gain is 0.65 (moderate category).

Effectiveness of Kepok Banana Peel Waste With Potassium Hydroxide Activation as Methylene Blue Dye Adsorbent Sidabutar, Putri Rebecca; Kembaren, Agus
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 7, No 2 (2024): JULY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i2.62254

Banana peels are usually considered as waste and cause environmental pollution. However, banana peels can be used as an adsorbent material to reduce the impact of methylene blue dye use because they contain high lignocellulose. This study aims to determine the characterization, optimum mass and optimum time. The adsorbent was made using dried and carbonized banana peels at a temperature of 400°C for 2 hours. After the carbonization process, the adsorbent was activated using 5 M potassium hydroxide for 2.5 hours. Based on the results of the study, it showed an optimum mass of 0.121 grams and an optimum time of 90 minutes. The efficiency of methylene blue dye absorption on activated carbon was higher than that of banana peel carbon.

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