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MEDIA PEMBELAJARAN KIMIA BERBASIS KOMPUTER UNTUK MATERI HIBRIDISASI KELAS XI SMA
Fitri Wijayanti, Yerimadesi, Syukri S,
SEMIRATA 2015 Prosiding Bidang Iptek dan Multi Disiplin
Publisher : SEMIRATA 2015
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Hibridisasi dan bentuk molekul yang diajarkan di SMA merupakan jenis konsep yang abstrak, sehingga sulit memahami dan menjelaskannya. Oleh karena itu dibutuhkan suatu media alternatif yang dapat digunakan oleh guru dan siswa. Penelitian ini bertujuan untuk menghasilkan media pembelajaran berbasis komputer yang layak digunakan untuk memahami konsep hibridisasi. Media dirancang dan dibuat menggunakan program macromedia flash 8, disajikan dalam bentuk gambar, animasi sederhana, dan disertai dengan pertanyaan interaktif untuk menuntun siswa menemukan kesimpulan pada setiap penanaman konsep. Penelitian ini termasuk penelitian pengembangan atau Research and Development (R&D). Uji kelayakan dilakukan kepada siswa kelas XI IPA di SMAN 1 IV Koto Kabupaten Agam. Instrumen penelitian yang digunakan berupa angket yang berisi pernyataan menyangkut bentuk, motivasi, dan kepraktisan dari media. Data yang diperoleh dianalisis dengan skala Likert. Hasil analisis angket menunjukkan skor rata-rata kelayakan media untuk topik hibridisasi secara keseluruhan adalah 4,24. Skor ini diinterprestasikan pada kategori kelayakan dengan nilai standar kelayakan (r)  4. Hasil ini menunjukkan bahwa media pembelajaran berbasis komputer untuk materi hibridisasi sangat layak digunakan untuk pembelajaran kimia kelas XI SMA.  Kata kunci: bentuk molekul, hibridisasi, media berbasis komputer, uji kelayakan
Validitas Dan Praktikalitas Modul Reaksi Redoks dan Sel Elektrokimia Berbasis Guided Discovery Learning untuk SMA
Yerimadesi, Yerimadesi;
Bayharti, Bayharti;
Oktavirayanti, Risa
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 2 No 1 (2018): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam
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DOI: 10.24036/jep/vol2-iss1/143
Module based on guided discovery learning can be used as an alternative to improve studentâs activeness and understanding the concept. This research aims to develop redox reaction and electrochemical cell module based on guided discovery learning and reveals its validity and practicability. The type of this research is a development research using 4-D development model. The research instrument used was a questionnaire in the form of validity and practicality sheet. This module was validated by 3 UNP chemistry lecturers and 2 chemistry teachers of SMAN 10 Padang. Practicality test were conducted on 2 chemistry teachers and 32 twelfth grade students of SMAN 10 Padang. Data were analyzed by Cohenâs Kappa formula. The results of the validity test showed that the module has a very high validity category (k=0.83). Practicality test results by teachers and students showed that the module has high practicality category (k=0.79 and 0.80). Based on the results of this research, it can be concluded that the module developed was valid, practical.
Pengembangan Lembaran Kerja Siswa (LKS) Ekperimen Berbasis Guided-Inquiry Materi Laju Reaksi Untuk Siswa SMA / MA
Andromeda, Andromeda;
Yerimadesi, Yerimadesi;
Iwefriani, Iwefriani
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 1 No 1 (2017): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam
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DOI: 10.24036/jep/vol1-iss1/47
This study aims to produce teaching materials based material reaction rate guided inquiry (learning cycle: the phase of exploration, discovery / establishment of the concept and application) in the form of a valid experiment worksheets and practical use in learning chemistry in SMA / MA. This type of research included in Research and Development (R & D). The development model used in this study is the four-D (4-D). The research instrument is the validation sheet and questionnaire. Data from the study consists of three aspects, namely, the validity, the practicalities and effectiveness of teaching materials. Data validity and practicalities processed using Cohens Kappa formula, and the effectiveness of data using a percentage In this study is limited to the validity and practicalities. Validation of teaching materials from the aspect of content, language and graffiti and feasibility of construction. Data from the validator obtained an average score moment kappa was 0.87, and the results of practical analysis conducted with a limited test in MAN 3 Padang obtained an average score of 0.84 practicality value of 0.78 of teachers and students. From the analysis worksheets that showed 86 % of students working on critical questions and exercises contained in LKS experiments that have been made can be answered students. These results indicate that LKS guided inquiry-based experiments developed extremely valid and practical use in learning chemistry
Efektivitas Penggunaan Modul Larutan Penyangga Berbasis Discovery Learning terhadap Hasil Belajar Siswa Kelas XI MIA SMAN 7 Padang
Yerimadesi, Yerimadesi;
Putra, Ananda;
Ririanti, Ririanti
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 1 No 1 (2017): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam
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DOI: 10.24036/jep/vol1-iss1/29
Quasi experiment research with randomized control posttest group only design was carried out to determine the effectiveness of using a discovery learning based module on students learning outcome. Grade XI MIA-1 to MIA-4 students academic year 2015/2016 in SMAN 7 Padang became population of this study. Through cluster sampling technique, grade XI MIA-1 and grade XI MIA-4 were chosen as experiment and control classes respectively. The experiment class was taught using discovery learning based module in buffer solution topic while the control class was taught the same topic conventionally without the module. Research instrument used was cognitive learning outcome test with multiple choice form. Data showed that the mean test score of experiement class (78.84) was higher than that of control class (71.09). Normality and homogenity test proved that both classes were homogeneous and normally distributed. T-test, as data analysis taken, showed that t-count (3,51) is bigger than t-table (1.67). Thus, it could be concluded that studentsâ cognitive learning outcome in experiment class is significantly higher than that in control class. The use of discovery learning-based module in buffer solution topic was effective in increasing learning outcome of grade XI MIA students in SMAN 7 Padang.
PENGEMBANGAN MODUL KESETIMBANGAN KIMIA BERBASIS PENDEKATAN SAINTIFIK UNTUK KELAS XI SMA/MA
Yerimadesi, Yerimadesi;
Bayharti, Bayharti;
Handayani, Fitri;
Legi, Wiwit Fitrah
Sainstek : Jurnal Sains dan Teknologi Vol 8, No 1 (2016)
Publisher : IAIN Batusangkar
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DOI: 10.31958/js.v8i1.444
This developmental research aimed to produce scientific approach-based module in chemistry equilibrium topic, determine its validity, practicality, and effectiveness on grade XI students? learning outcome. It was based on 4-D development model that included defining, designing, and developing stage. Module was validated by expert and tested to senior high school (SMA) students. Research instruments used were questionnaire in the form of validity and practicality sheets and learning outcome test. Validity sheets were completed by 5 chemistry lecturers and 3 chemistry teachers. Practicality sheets were completed by 4 chemistry teachers and 25 grade XI students in public SMA (SMAN) 2 Batusangkar. Data were analyzed with Kappa Moment. The mean score of Kappa Moment for validity was 0.84 indicating a high degree of validity. The mean score of Kappa Moment for practicality were 0.87 (for students) and 0.84 (for teachers) indicating a very high degree of practicality. Effectiveness of the module was obtained from cognitive test score of students in SMAN 4 Padang. Analysis showed that the test score of students taught with module was siginificantly higher than that of students who were not. It can be concluded that the module developed was valid, practical, and effective for senior high school instruction.Key words: chemistry equilibrium, module, scientific approach.
EKSTRAK DAUN TEH (Camellia sinensis) SEBAGAI ALTERNATIF INHIBITOR KOROSI BAJA DALAM MEDIUM AIR LAUT
., Yerimadesi
Sainstek Vol5, No 1, 2010
Publisher : Jurnal Sainstek
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Research about the use of tea leaf (Camellia sinesis) as steel corrosion inhibitor alternative in sea water medium has been done. The aim of this research is to find out the influence of tea leaf extract on the rate of corrosion, the degree of closeness and efficiency of steel corrosion inhibition in sea water medium. The method used is weight loss method (the deficiency of weight). The steel sample has the code of ASSAB 760 (AISI 1148, 0.5%) and the tea leaf sample used is the old tea leaf. The tea leaf is extracted with aquadest as the solvet. The characteristic of steel surface endued and unendued by inhibitor are then analyzed with Carton Stereo Trinocular Optic Photo with 100 times magnification. The result of research shows that the tea leaf extract reduces the rate corrosin of steel ASSAB 760 in sea water medium. The rate of steel corrosion unendued by inhibitor is 1.13 x 10-4 g/cm2.day, the rate of steel corrosion endued by inhibitor (tea leaf extract) is 1.07 x 10-5 g/cm2.day. The efficiency of steel corrosion inhibition increases along with the longer of steel soaked in sea water medium. The analysis of steel surface shows the formation of purple pasive layer from iron-tanin complex. Key words: tea leaf extract, steel corrosion, inhibitor, sea water, iron-tanin complex.
PERBANDINGAN EFISIENSI INHIBISI KOROSI BAJA OLEH EKSTRAK DAUN TEH DENGAN CAMPURAN EKSTRAK DAUN TEH DAN KALSIUM GLUKONAT
., Yerimadesi;
Mon, Irma;
Elsa Mona, Dewi
Sainstek Vol 5, No 3, 2010
Publisher : Sainstek
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The inhibition efficiency of steel corrosion by tea leaf extract and mixture of tea leaf extract and calcium gluconate was studied by using weight loss techniques. The steel sample has the code of ASSAB 760 (AISI 1148, 0.5%) and the tea leaf sample used is the old tea leaf. The inhibition efficiency by mixture of tea leaf extract and calcium gluconate is higher than the inhibition efficiency by tea leaf extract. Key words: inhibition efficiency of steel corrosion, tea leaf extract, tea leaf extract/calcium gluconate blends, inhibitor.
Judul Pengembangan E-Modul Larutan Elektrolit dan Non Elektrolit Berbasis Guided Discovery Learning untuk Kelas X SMA/MA
Wildayati, Wildayati;
Yerimadesi, Yerimadesi
Entalpi Pendidikan Kimia Pre-print Vol 2, No 2, 2021
Publisher : Universitas Negeri Padang
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DOI: 10.24036/epk.v0i0.143
Penelitian pengembangan ini bertujuan untuk menghasilkan dan menentukan tingkat validitas dan praktikalitas dari e-modul yang dikembangkan. Jenis penelitian adalah Research and Development (R D) dengan model pengembangan Plomp. Uji validitas dilakukan terhadap empat orang dosen jurusan kimia FMIPA UNP dan tiga orang guru kimia SMA. Uji praktikalitas dilakukan oleh tiga orang guru kimia dan 32 siswa kelas XI SMAN 7 Padang tahun ajaran 2020/2021. Instrumen penelitian berupa angket validitas dan praktikalitas. Hasil  validitas yang didapatkan dianalisis dengan Content Validity Ratio (CVR) dan praktikalitas dianalisis dengan formula Aikens’V.Dari hasil penelitian diperoleh nilai rata-rata CVR validitas konten e-modul sebesar 0,95 (valid), validitas konstruk 0,82 (valid), praktikalitas e-modul pada guru 0,89 (praktis) dan pada siswa 0,82 (praktis). Berdasarkan hasil penelitian disimpulkan bahwa e-modul larutan elektrolit dan non elektrolit berbasis guided disscovery learning untuk kelas X SMA/ MA yang dikembangkan sudah valid dan praktis.
Validitas E-Modul Kimia Unsur Berbasis Guided Discovery Learning untuk Kelas XII SMA/ MA
Khaira, Ulfa;
Yerimadesi, Yerimadesi
Entalpi Pendidikan Kimia Vol 2, No 1 (2021)
Publisher : Universitas Negeri Padang
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DOI: 10.24036/epk.v2i1.124
E-modul kimia unsur berbasis guided discovery learning telah dikembangkan dan dianalisis tingkat validitasnya untuk membantu proses pembelajaran peserta didik. Penelitian ini tergolong kepada Research and Development dengan model Plomp. The e-module divalidasi oleh tujuh orang validator ahli materi dan tiga orang ahli media. Instumen penelitian yang digunakan berupa angket validitas. Data dianalisa dengan menggunakan Content Validity Ratio (CVR) dan formula kappa Cohen’s. Hasil uji validitas konten diperoleh nilai rata-rata CVR sebesar 0,986. Hasil uji validitas konstruk dan validitas ahli media diperoleh nilai rata-rata momen kappa sebesar 0,90 dan 0,89. Data tersebut menunjukkan bahwa e-modul memiliki tingkat kevalidan yang sangat tinggi. Berdasarkan hasil penelitian, disimpulkan bahwa e-modul yang dikembangkan valid serta dapat dilakukan uji praktikalitas dan efektifitasnya.Kata Kunci: e-modul, guided discovery learning, kimia unsur
Pengaruh Penerapan Model GDL Berbasis LSLC Terhadap Hasil Belajar Siswa di SMA Negeri 15 Padang
Mahesa, Anggita;
Yerimadesi, Yerimadesi
Jurnal Pendidikan Tambusai Vol. 6 No. 1 (2022): April 2022
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia
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DOI: 10.31004/jptam.v6i1.2997
Pelaksanaan kurikulum 2013 belum maksimal dalam proses pembelajaran karena berpusat pada guru. Materi Elekrolisis sulit untuk dipahami. Dengan adanya pengaruh pandemi justru berdampak negatif terhadap hasil belajar siswa. Solusinya guru harus melaksanakan LSLC untuk membentuk komunitas dan berkolaborasi dalam memperbaiki proses pembelajaraan saat ini. Tujuan penelitian untuk mengetahui pengaruh model GDL berbasis LSLC terhadap hasil belajar siswa pada materi elektrolisis di SMA Negeri 15 Padang. Penelitian ini tergolong kepada eksperimen semu. Pengambilan sampel dilakukan dengan teknik random sampling. Hasil analisis data didapatkan bahwa sampel terdistribusi normal dan homogen, maka uji hipotesis dilakukan dengan uji-t pada . Diperoleh thitung 5,08 dk 68 dan nilai ttabel 1,67. Nilai thitung > ttabel artinya hasil belajar siswa yang menggunakan model pembelajaran GDL berbasis LSLC lebih tinggi secara signifikan daripada hasil belajar siswa tanpa menggunakan model pembelajaran GDL berbasis LSLC pada materi elektrolisis di SMA Negeri 15 Padang.