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All Journal Jurnal Pembelajaran MIPA JURNAL EDUCATION AND DEVELOPMENT Sainstek : Jurnal Sains dan Teknologi
Elvy Rahmi
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Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Education Languange, Linguistic, Communication & Media Other

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 1 
PENERAPAN PEMBELAJARAN KOOPERATIF TIPE TAI DAN STRATEGI PQ4R PADA PEMBELAJARAN BIOLOGI KELAS X DI SMAN 1 TIGO NAGARI Kurningsih, Titik; Haviz, M.; Rahmi, Elvy
Jurnal Pembelajaran MIPA Vol 1, No 1 (2014)
Publisher : Jurnal Pembelajaran MIPA

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Abstract

The aim of this research is to find out the students’ achievement and activities by applying cooperative teaching of team assisted individualization (TAI) type and PQ4R strategy at the grade students’ of SMAN 1 Tigo Nagari. The design of this research is guasi experimental research by randomized control group post-test only  design. The procedurs of this research ensists of preparation, operation and post operation. The instruments of this research are test and observation sheet. The technique of data analysis used by the research was t-test. The result of the research shars that there is a significance differences of man score, standard denation, and variant among the control and experimental class. Therefore, it can be encluded that the students’ achievement of experimental class is better than the control class.Key words: cooperative teaching, type TAI and PQ4R Strategy, biology teaching
PENERAPAN PENDEKATAN KONTEKSTUAL DAN MODEL PEMBELAJARAN KOOPERATIF TIPE CRH PADA PEMBELAJARAN FISIKA SISWA KELAS XI IPA SMAN 1 RAMBATAN Stephani, Ayu; Rahmi, Elvy; Asmendri, Asmendri
Jurnal Pembelajaran MIPA Vol 1, No 1 (2014)
Publisher : Jurnal Pembelajaran MIPA

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Abstract

Purpose of this research is to know the result of student physics in applying of contextual approach and cooperative model type of course review hooray in class of XI IPA SMAN 1 Rambatan. The type of this Research is quasi experiment with research device in the form of randomized control group posttest only design. Research procedure differentiated into three phase that is preparation, execution and solution. Research instrument is used observation sheet and result test of learning. Analyze technique of data is used normalitas test, homogeneity test and hypothesis test. The Result of research shows the difference of average value, standard deviation and variants between experiment classes with control classes. The existence of this research is cause of the influence in applying contextual approach and cooperative model type of course review hooray. The use of this approach make students can find the material of study and connecting it with their real life situation, so that the atmosphere of class become active and pleasant. This matter can improve the understanding of student toward the material. The result of this research also shows raised hypothesis at this research is accepted, so that it can be concluded, the result of student in experiment classes which applying of contextual approach and cooperative model type of course review hooray is better than of control classes.Key words: contextual approach, cooperative learning, course review hooray, physics Study
EFEKTIVITAS PENGGUNAAN MODUL PEMBELAJARAN BIOLOGI BERBASIS KONTEKSTUAL PADA POKOK BAHASAN EKOSISTEM SISWA KELAS X DI SMAN 1 RAMBATAN Yerita, Heppy; Haviz, M.; Rahmi, Elvy
Jurnal Pembelajaran MIPA Vol 1, No 1 (2014)
Publisher : Jurnal Pembelajaran MIPA

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The purpose of this research is to see the effectivity of using module in Biology learning process contextual-based in “Ecosystem” for SMAN 1 Rambatan, class X. This is semu-experimental research and descriptive by Randomized Control Group Only Design. The procedure of this research divided into 3 steps; planning, actuating, and finishing. The research instrument is final test, observation paper, angket. The result of this research shows that there is the difference of mean, standar deviasi and variants between experiment-class and control-class. The study result of students that given module is better than students that taught by convensional system. So, we can conclude that the effectiveness of the module that used can be reached.Key Words : effectivity, module, contextual, ecosystem
KONSTRUKSI DAN VALIDASI MODUL PEMBELAJARAN BIOLOGI BERBASIS KONSTRUKTIVISME DAN PROBLEM SOLVING UNTUK SISWA SMA KELAS XI IPA Afsa, Rini; Haviz, M.; Rahmi, Elvy
Jurnal Pembelajaran MIPA Vol 1, No 1 (2014)
Publisher : Jurnal Pembelajaran MIPA

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The research was aimed to design and know about validation of biology module based on constructivisme and problem solving. The kind of this research was Research of Development. This research used 4-D model developing, they were define, design, develop and disseminate. Prosedure of research have been done in three phase, they are define, design and develop. Biology module based on constructivisme and problem solving was valid. Based on the result of validation and analysis quantitavely and qualitatively, module development was also based on characteristic of constructivisme and problem solving approach. So, the quality of development result product was valid based on result of validation that have done.Key words: develop, construction, validation, module, constructivisme, problem solving
EFEK KONSENTRASI Cu PADA STRUKTUR DAN SIFAT HANTARAN LISTRIK NANOPARTIKEL CuPt Imamora, Marjoni; R, Setia Erlila; Rahmi, Elvy; Maiyena, Sri; Umar, Akrajas Ali
Sainstek : Jurnal Sains dan Teknologi Vol 7, No 1 (2015)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.139 KB) | DOI: 10.31958/js.v7i1.128

Abstract

The investigation of bimetallic CuPt Nanoparticles (CuPt NPs) with average diameters in the 196.7±98 nm range have been prepared by the Liquid phase deposition methods and synthesized directly on an indium tin oxide (ITO) substrate. CuPt NPs with  high surface defect grown on (ITO) surface were prepared via a simple immersion of the substrate into a solution contains 1 mM Potassium Hexachloro Platinate (K2PtCl6), 0.2 mM Anhydrous Copper (II) Sulfate (CuSO4) anhydrous, 0.01 M Sodium dodecyl sulfate (SDS) and 10 mM Formic acid for 4 h at room temperature. The modification of Cu2+ ion precursor play a role to determine the nanoparticles geometry obtained. The simultaneous reduction of metal ions leads to either a surface enriched with one component or an alloy type of structure depending on the bimetal composition. The bimetallic CuPt NPs dispersions are characterized by FESEM, EDX Mapping, XRD, HRTEM and XPS analysis.Key words: CuPt, Liquid phase deposition, Bimetallic CuPt NPs
STUDI CELAH ENERGY 1,3,4 MONOMER DAN DIMER TIADIAZOL TERSUBSTITUSI-BH2 Rahmi, Elvy
Sainstek : Jurnal Sains dan Teknologi Vol 4, No 1 (2012)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1050.093 KB) | DOI: 10.31958/js.v4i1.53

Abstract

The band gap of a 1,3,4 thiadiazole of monomer and dimmer in anti position, monomer and dimer of its ? BH2 substituted of those compounds had been studied by Calzaferri method. The optimized geometry had been obtained by optimizing the bond length (l) arA bond angel (?). The bond surface (?) was not been optimized since those molecules were assumed to be planar. The band gap was determined by measuring the different of HOMO and LUMO of the optimal condition. From there studies it were obtained that the Eg 1,3,4 thiadiazole monomer ard dimer in anti position, monomer and dimer of its substiruted - BH2 were 4,35793 eV; 3.31008eV ; 4.8900eV ;3,09322 eV; 3.11124 eV, respectively. Based on Eg. valued it was concluded that monomer substituted by -BH2, 1,3,4 thidiazole diamer in anti position and dimmer of its substituted - BH2 have Eg in semiconductor range (1,0-3,5 eV). The 1,3,4 thiadiazole monomer had Eg in the isolator range.Key words: Monomer, Dimer, Tiadiazol Tersubstitusi-BH2
STUDI MOLEKUL m2N2 DENGAN GRUP SIMETRI D~h DAN D2h MENGGUNAKAN METODE AB INITIO Rahmi, Elvy
Sainstek : Jurnal Sains dan Teknologi Vol 2, No 1 (2010)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.276 KB) | DOI: 10.31958/js.v2i1.11

Abstract

The study on molecule m2N2 (m=H, Li, Na, Be, Mg, B, Al, C, Si, N, P, O, S, F, Cl) with symmetrical groups D~h and D2h had been conducted by using Ab Initio method. As a part of HyperChem pro 6.0, this program was operated with Pentium 4. The research involved a number of linear cyclic molecules m-N-N-m as well as m-N-m-N. As the result of the computation process, it was found that generally the cyclic molecules m2N2 were more stable than those of the other linear molecules signed with the smaller total energy. It was also found that the most stable linear molecules were NºN resulted from the optimalization of Cl-N-N-Cl with the total molecule energy: -637778.1251 kcal/mol. Meanwhile, the most stable cyclic molecules were S-N-S-N with the total molecule energy: -560789.9726 kcal/mol. Key words: cyclic molecule, ab initio
PENGEMBANGAN MEDIA PEMBELAJARAN TEKA-TEKI KIMIA (TATIK) BERBASIS ANDROID PADA MATERI REAKSI REDUKSI DAN OKSIDASI KELAS X DI SMA N 1 KOTO BARU Regita Rahmi Nur Azizah; Elvy Rahmi; Mimi Herman
Jurnal Education and Development Vol 11 No 1 (2023): Vol.11 No.1. 2023
Publisher : Institut Pendidikan Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (513.197 KB) | DOI: 10.37081/ed.v11i1.4235

Abstract

Penelitian ini didasarkan pada kurangnya media yang digunakann saat pembelajaran dan masih kurangnya pemahaman konsep siswa ketika pembelajaran, sehingga rendahnyanilai ulangan harian, siswa kelas X IPA berjumlah 30 orang, yang mencapai ketuntasan hanya 14 orang, kelas X IPA 2 berjumlah 30 orang, yang mencapai ketuntasan hanya 8 orang, dan kelas X IPA 3 berjumlah 30 orang, yang mencapai ketuntasan hanya 13 orang. Media pembelajaran Teka-Teki Kimia (TATIK) berbasis android dirasa perlu dikembangkan untuk dijadikan media pembelajaran oleh siswa. Tujuan penelitian ini untuk menghasilkan valid dan praktis media pembelajaran Teka-Teki Kimia (TATIK) Berbasis Android pada Materi Reaksi Reduksi dan Oksidasi kelas X di SMA N 1 Koto Baru. Metode yang peneliti gunakan yaitu Research and Development dan model 4D (define,design, develop and disseminate). Tahapan model 4Dini dilakukan mulai tahap pertama sampai ketiga, ada 1) tahap define, dilakukan untuk mendapatkan gambaran keadan dilapangan, 2) tahap design, dilakukan untuk menyiapkan media awal Teka-Teki Kimia (TATIK), 3) tahap develop, hasil dari validitas dan praktikalitas. Hasil akhir penelitian ini yaitu: 1) media pembelajaran Teka-Teki Kimia(TATIK) berbasis android hasil validitas yang diperoleh 87,7% termasuk kategori valid, 2) instrument media pembelajaran Teka-Teki Kimia (TATIK) sudah memenuhi kriteria valid dengan hasil validitas yang di peroleh 91,6%, dan 3) media Teka-Teki Kimia (TATIK) berbasis android sudah memenuhi kriteria praktis dengan hasil angket respon siswa 91,8%.
Co-Authors Akrajas Ali Umar Asmendri Asmendri Ayu Stephani Heppy Yerita M. Haviz Marjoni Imamora Ali Umar Mimi Herman R, Setia Erlila Regita Rahmi Nur Azizah Rini Afsa Sri Maiyena Titik Kurningsih