ANALISIS MODEL MENTAL SISWA MENGGUNAKAN TES DIAGNOSTIK MODEL MENTAL TWO-TIER (TDM-TWO-TIER) PADA MATERI LAJU REAKSI

This research was instigated by student mental model that was not intact on Reaction Rate lesson. It aimed at analyzing and knowing student mental model through Two-Tier (TDM-Two-Tier) Mental Model Diagnostics Test instrument (TDM-Two-Tier) on Reaction Rate lesson at State Senir High School 2 Pekanbaru. This research was conducted at the first semester in the Academic Year of 2019/2020. It was Descriptive quantitative research. The data in this research were collected by Two-Tier (TDM-Two-Tier) Mental Model Diagnostics Test instrument, interview, and documentation. The collected data were analyzed by using Descriptive analysis. Purposive Sampling technique was used in this research. The samples of this research were 36 students at the eleventh grade of MIPA 2 of State Senior High School 2 Pekanbaru. The research findings showed that student mental model was not intact. It could be seen from the mean score of student mental model that was obtained from TDM-Two-Tier Diagnostics Test, Scientifically Correct (SC) of intact mental model or Scientifics was 47%, Partially Correct (PC) or partial mental model or alternative was 48%, students were able to understand the macroscopic level was 12%, symbolic level was 17% and submicroscopic level was 19% and Specific Misconception (SM) or misconception was 5%. Keywords: Mental Model, TDM-Two-Tier, Reaction Rate

Desain Uji Coba Kit Praktikum Sel Galvani Menggunakan Tomat (Lycopersicon esculentum) Pada Materi Elektrokimia

ABSTRAKDalam proses belajar mengajar peserta didik memiliki pemahaman yang rendah, media yang digunakan masih kurang bervariasi sehingga dibutuhkan suatu alat peraga berupa kit praktikum sel galvani menggunakan tomat. Tujuan dari penelitian ini adalah untuk mendesain kit praktikum sel galvani menggunakan tomat (Lycopersicon esculentum) sebagai media pembelajaran pada materi elektrokimia yang valid berdasarkan validitas ahli materi, ahli media, praktikalitas guru dan respon peserta didik. metode penelitian yang digunakan adalah Research and Development (R&D) dengan modifikasi model Brog and Gall di MA Pondok Pesantren Bahrul ‘Ulum Al-Islamy. teknik pengumpulan data yang digunakan dalam penelitian ini yaitu berupa wawancara, angket, dan dokumentasi. kit praktikum sel galvani yang didesain memperoleh persentase kevalidan sebesar 87,71% yang berarti kit praktikum sel galvani dinyatakan sangat valid. persentase kepraktisan kit praktikum sel galvani yang diperoleh sebesar 89,61% yang dinyatakan sangat praktis dan mendapatkan respon yang baik dari peserta didik dengan persentase 92,06% dan hasil tersebut disimpulkan bahwa kit praktikum sel galvani menggunakan tomat (Lycopersicon esculentum) pada materi elektrokimia sudah valid, praktis dan mendapatkan respon yang baik dari peserta didik.Kata Kunci : Kit Praktikum, Tomat (Lycopersicon esculentum), Elektrokimia, Research and Development (R&D)

PENGARUH PENERAPAN PROBLEM BASED LEARNING DENGAN MEDIA CHEMIMAGZ TERHADAP HASIL BELAJAR SISWA PADA MATERI HIDROKARBON

This research was instigated by the low of student chemistry learning achievement at the eleventh grade of MIPA of State Senior High School 3 Dumai. Therefore, it was conducted an Experimental research with pretest and posttest design. This research aimed at knowing the effect of implementing Problem Based Learning model with Chemimagz media toward student learning achievement on Hydrocarbon lesson. The subjects of this research were the eleventh-grade students of MIPA in the Academic Year of 2017/2018. The samples of this research were the eleventh-grade students of MIPA 1 as the Experimental group and the students of MIPA 2 as the Control group. The data in this research were collected by using observation, preliminary data test that was homogeneity test, final data tests that were pretest and posttest, and documentation. Kp formula was used to know the effect of implementing the model toward learning achievement. The difference effect was analyzed by using Paired Sample t-test. Based on the data analysis of preliminary and final data, it was obtained that tobserved was 2,267 and ttable was 2,002 at 5% significant level. tobserved was higher than ttable, so H0 was rejected and Ha was accepted. It meant that there was an effect of impelenting Prblem Based Learning model with Chemimagz media toward student learning achievement on Hydrocarbon lesson at the eleventh grade of MIPA of State Senior High School 3 Dumai, and the effect was 8,27%.Keywords: Learning Achievement, Problem Based Learning, Chemimagz, Hydrocarbon

PENGEMBANGAN MODUL PEMBELAJARAN KIMIA BERORIENTASI CHEMOENTREPRENEURSHIP PADA MATERI POLIMER KELAS XII SMA/ MA

This study aims to develop chemoentrepreneurship oriented chemistry learning modules (CEP) on polymer materials in class XII SMA / MA. This research was conducted at the Chemistry Education Campus of the Teaching and Education Faculty (FKIP) of Riau University. When the research began in September-December 2019. This study uses a type of Research and Development (RnD) research with a 4D research model consisting of 4 stages namely Define, Design, Develop, and Disseminate. In this study, researchers only reached the development stage. Data collection instruments in the form of validation sheets and respondent sheets. Data analysis was performed using evaluation criteria for the level of validity, the level of practicality by the teacher and the level of attractiveness according to students. The results of the chemoentrepreneurship oriented chemistry learning module (CEP) on polymeric materials get a value of 92.35%. with valid criteria, the teacher's response as a user to the practicality of the module gets a value of 91.67% and the response of students as users to the attractiveness of the module gets a value of 90.67% with interesting criteria. Thus, chemoentrepreneurship oriented chemistry learning modules (CEP) in the grade XII SMA / MA polymer materials have been well developed and ready to be implemented on a broader scale.

PENGEMBANGAN LKPD BERBASIS OSBORN PADA POKOK BAHASAN LAJU REAKSI UNTUK KELAS XI SMA/MA SEDERAJAT

This study aims to develop Student Worksheets Based on Osborn on the subject of valid reaction rates based on aspects of content suitability, Osborn characteristics, language, presentation, and graphics. This type of research is research and development (R and D) with reference to the Plomp development process. The subject of this study was a student worksheet based on Osborn. Data collection instrument is a validation given to three validators, and from the data analysis, the validity of the content aspect, Osborn characteristic aspects, language aspects, presentation aspects, and graphic aspects are 95.8%, 100%, 88.28%, 88.86% and 91.62% with a valid category. The student worksheet validated by the validator was tested on 30 students and got a response result with a percentage of 89.35% with very good criteria, and from two teachers got a response result with a percentage of 93.75% with very good criteria. Based on the results of data analysis, it can be concluded that the student worksheet based on OSBORN produced is valid and can be used for the subject of the reaction rate.

Desain dan Uji Coba Media Pembelajaran Alat Peraga Penjernihan Air Sederhana Berorientasi Green Chemistry Pada Materi Koloid di SMA Negeri 1 Pekanbaru

This research was instigated by the unavailability of the instructional media implementing green Chemistry concept and the limitation of laboratory facilities at State Senior High School 1 Pekanbaru. It aimed at knowing the validity and practicality levels of Green Chemistry oriented Simple Water Purifier prop instructional media on Colloid lesson, the guidebook of constructing and using props. It was Research and Development (R&D) with 4D development model. The technique of collecting the data was questionnaire. Instruments of collecting the data were validity test questionnaire, practicality test questionnaire, and student response questionnaire. The assessment of the prop and guidebook by the experts of material showed the percentages continuously 93.33% and 90%. The assessment of the prop and guidebook by the experts of media showed the percentages continuously 80.95% and 83.33%. The practicality assessment of the prop and guidebook by the teachers showed the percentages continuously 94.25% and 98.33%. The practicality assessment by the students showed the percentage 90.25%.

DESAIN DAN UJI COBA MODUL KIMIA BERORIENTASI GREEN-CHEMISTRY PADA MATERI LARUTAN ELEKTROLIT DAN NONELEKTROLIT

This research aimed at designing Green-Chemistry-oriented Chemistry module on Electrolyte and Nonelectrolyte Solution lesson that was valid based on validity media expert, lesson expert, teacher practicality, and student response. It was Research and Development (R&D) research that implemented Borg and Gall Development model. It was administered at the eleventh-grade students of MIPA 1 of State Senior High School 1 Kampar. The instruments of collecting the data were validity test questionnaire by the experts, teacher practicality test questionnaire, and student response questionnaire. The collected data were analyzed by using Descriptive qualitative and quantitative analysis techniques. The module could be stated appropriate, if it passed validity and practicality aspects. The validity result of chemistry module by 2 media experts and a material expert was 87.09% and it was on very valid category. Practicality test of 3 Chemistry subject teachers showed a result 87.84% that was on very practical category, and it was obtained a very positive response from 10 students, it could be seen from questionnaire result 90.78%. Based on these results, it could be identified that Green-Chemistry-oriented Chemistry module on Electrolyte and Nonelectrolyte Solution lesson was appropriate and practical to be an additional teaching material for teachers at a school.Keywords:Module, Green-Chemistry, Electrolyte and Nonelectrolyte Solution.

PENGEMBANGAN INSTRUMEN TES ESSAY KEMAMPUAN BERPIKIR KRITIS PESERTA DIDIK PADA MATERI IKATAN KIMIA KELAS X SMA/MA

This study aims to produce an essay test instrument for critical thinking skills on chemical bonding material and to know the validity, reliability, distinguishing features, and the difficulty level of the test instrument. The research method uses the ADDIE model with five stages namely analyze, design, develop, implementation, & evaluation. In this research formative evaluation is done, meaning that the evaluation stage is carried out at the end of each stage. The test developed in the study consisted of eight essay items, referring to 10 indicators of critical thinking according to Ennis. Validation of items was done by three validators. Based on the validity according to the experts obtained an average of every aspect, namely 95% material, 96.87% construction and 91.15% language with an overall average score of 94.34% validation has a valid category. Eight valid questions were tested on 20 students. The calculation of the reliability coefficient (r11) with the Alpha Cronbach formula was obtained at 0.65 in the high category, the distinguishing power had an average value of 0.26 in enough categories and the difficulty level of the questions had an average value of 0.42 in the medium category. The developed test instrument is declared valid, reliable, has a good differentiating power, and the level of difficulty of the questions that are being made so that it can be used as a measuring tool to determine students' critical thinking skills.Key word: Research & development, critical thinking test instrument,chemical bonding

DESAIN PERANGKAT PEMBELAJARAN BLENDED LEARNING BERBASIS EDMODO PADA MATERI HIDROKARBON DAN MINYAK BUMI

The blandes learning model has not yet been implemented so that it needed for new innovations in learning. Hydrocarbon and Crude Oil Lessons were abstract and compact lessons, so it needed time to finish it. This research aimed at producing Edmodo based blended learning media on Hydrocarbon and Crude Oil lessons and knowing the validity level of the produced media. It was Research and Development (R&D) with Borg & Gall model. The subjects of this research were Chemistry lecturers and teachers. Techniques of collecting the data were interview, validity test questionnaire, practicality test, and documentation. Analyzing the data was done by using qualitative and quantitative descriptive analysis techniques. The research findings showed that it was obtained 84.6% (very valid) for validity level of learning implementation plan, 84.4% (very valid) for validity level of student workbook, and 80.4% (valid), 83.4%( very practice) for practicality level of learning implementation plan, and 82.9% (very practice) for practicality level of student workbook, and 80.4% (practice) for practicality level of Edmodo e-learning media. Based on this research, it could be concluded that Edmodo based blended learning media on Hydrocarbon and Crude Oil lessons could be tested. Keywords: Learning Media, Edmodo, Hydrocarbon and Crude Oil

PENGEMBANGAN LKPD BERBASIS READING, MIND MAPPING, AND SHARING PADA MATERI SENYAWA HIDROKARBON UNTUK KELAS XI SMA/MA

This Research aims to develop Student Worksheets Based on RMS on the Hydrocarbon Compound valid based on the feasibility aspect of content, characteristics of RMS, language, serve and graphic. The type of this research is research and development (R and D) with reference to the development process of Plomp. The subject of this research is student worksheets based on RMS. Instrument of data collection are validation given to three validators, and from analysis data obtained by the validity of aspect of content, aspect of characteristics of RMS, aspect of language, aspect of serve, and aspect of graphic are 93.9%, 95%, 96.8%, 100% and 92% with valid category. Student worksheets which validated by the validators tested to 32 students and get response result with percentage of 91.3% with very good criteria, and from two teachers get response result with percentage of 97% with very good criteria. Based on the result of data analysis can be concluded that student worksheets based on RMS that produced is valid and can be used for the Hydrocarbon Compound. Key words: Hydrocarbon Compound, Student Worksheet, RMS