This research aimed at describing the effectiveness of the local culture-based 7E learning cycle model in improving students' critical thinking skills in chemistry learning. It was an experimental research with post-test only control group design. The population was the eleventh-grade students of senior high schools in Singaraja, Indonesia. The sample included 111 students; 57 students as the experimental group and 54 students as the control group. The students in the experimental group learned through the local culture-based 7E learning cycle model, whereas the ones in the control group learned through the discovery learning model. The data on the students' critical thinking skills were collected through the critical thinking skills test. The data were analyzed through descriptive and inferential analysis, namely: Independent Sample T-Test for normal and homogeneous data, but Mann-Whitney U-Test for not normal and/or not homogeneous data. The results showed that the average score of students' critical thinking skills on the experimental and control groups were 64,5 and 55,3 respectively. The average score of the students' critical thinking skills on the experimental and control groups in the high-level school were 70.0 and 58.4, respectively, but in low-level school, they were 58.7 and 50.8 respectively.

Tujuan penelitian ini adalah mendeskripsikan (1) minat belajar siswa pada mata pelajaran kimia dan (2) faktor-faktor yang memengaruhi minat belajar siswa pada mata pelajaran kimia di SMAS Laboratorium Undiksha Singaraja. Penelitian ini merupakan penelitian deskriptif kualitatif dengan pendekatan fenomenologi. Jumlah sampel yang digunakan untuk mendapatkan data tentang minat belajar siswa dalam penelitian adalah sebanyak 45 orang siswa kelas XI MIA SMAS Laboratorium Undiksha Singaraja yang diambil dengan teknik sensus, sedangkan jumlah sampel yang digunakan untuk mendapatkan data faktor-faktor yang memengaruhi minat belajar adalah 15 orang siswa yang diambil dengan teknik purposive sampling. Hasil penelitian menunjukkan bahwa profil minat belajar kimia siswa kelas XI MIA SMAS Laboratorium Undiksha Singaraja adalah 38% siswa yang tergolong tinggi, 51% siswa yang tergolong sedang, dan 11% siswa yang tergolong rendah. Minat belajar kimia siswa di SMAS Laboratorium Undiksha Singaraja dipengaruhi oleh faktor internal dan faktor eksternal. Faktor internal yang memengaruhi minat belajar kimia adalah keingintahuan, cita-cita, motivasi, serta intelegensi sedangkan faktor eksternal yang memengaruhi yakni lingkungan keluarga, cara guru mengajar, teman sebaya, dan bahan pelajaran.ABSTRACT The purpose of this study is to describe (1) interest in learning of student’s chemistry subject matter and (2) the factors that affect student’s interest in learning chemistry subject matter at Laboratory SMAS Undiksha Singaraja. This research is a qualitative descriptive study with a phenomenological approach. The number of samples used to get data about student’s learning interest in the study were 45 students of class XI MIA at Laboratory SMAS Undiksha Singaraja taken by census techniques, while the number of samples used to obtain data on factors affect learning interest were 15 students were taken by purposive sampling techniques. The results showed that the profile of student’s interest in learning chemistry subject matter of class XI MIA at Laboratory SMAS Undiksha Singaraja in general was 38% students classified as high, 51% students classified as moderate, and 11% students classified as low. Student’s interest in learning chemistry subject matter at Laboratory SMAS Undiksha Singaraja was affected by internal factors and external factor. Internal factors that affect the interest in learning chemistry was curiosity, future goals, motivation, and intelligence mean while external factors affecting was family environment, teachers, peers, and teaching materials.

ABSTRAK Penelitian ini bertujuan mendeskripsikan dan menjelaskan kesiapan belajar siswa kelas X MIPA ditinjau dari aspek kesiapan fisik, materiil, psikis, dan kognitif dalam pembelajaran kimia di SMA Negeri 4 Singaraja. Jenis penelitian ini adalah fenomenologi dengan menggunakan pendekatan deskriptif kualitatif. Subjek dalam penelitian ini adalah seluruh siswa kelas X MIPA SMA Negeri 4 Singaraja yang berjumlah 188 orang. Objek dalam penelitian ini adalah kesiapan belajar siswa yang ditinjau dari aspek kesiapan fisik, materiil, psikis, dan kognitif. Metode pengumpulan data pada penelitian ini di antaranya observasi, pemberian angket, pemberian pretest, dan wawancara. Data yang diperoleh dianalisis menggunakan teknik analisis deskriptif interpretatif. Hasil penelitian menunjukkan bahwa kesiapan belajar siswa kelas X MIPA SMA Negeri 4 Singaraja tahun ajaran 2018/2019 secara umum dalam kategori cukup, yang mana untuk kesiapan belajar siswa dari aspek kesiapan fisik dan materiil termasuk dalam kategori baik, kesiapan belajar siswa dari aspek kesiapan psikis termasuk dalam kategori cukup, dan kesiapan belajar dari aspek kognitif termasuk dalam kategori cukup. Kata kunci: kesiapan belajar, pembelajaran kimia, SMA Negeri 4 Singaraja ABSTRACT This research aims to describe and explain students’ learning readiness of 10th grade mathematic and science in term of aspects physical, material, psychological, and cognitive readiness in learning chemistry at SMA Negeri 4 Singaraja. The type of research was phenomenology using a qualitative approach. The subjects in this reseach were all students’ of 10th grade matematic and science SMA Negeri 4 Singaraja which amounted to 188 people. The object in this reseach was student learning readiness in term of aspects physical, material, psychological, and cognitive readiness. Data collection methods used were observation, questionnaire, giving pretest, and interviews. Data obtained were analyzed using interpretative descriptive technique. The results of this reseach show that the students’ learning readiness of 10th grade mathematic and science SMA Negeri 4 Singaraja for academic year 2018/2019 in general is sufficient category, which for students’ learning readiness from aspects of physical and material readiness was included in the good category, student readiness from aspects of psychological readiness included in sufficient categories, and readiness to learn from cognitive aspects is included in the sufficient category. Keywords: chemistry learning, learning readiness, SMA Negeri 4 Singaraja

THE EFFECT OF GREEN CHEMISTRY LAB EXPERIMENTS ON STUDENTS' ATTITUDES TOWARDS CHEMISTRYAbstractThis study aimed to investigate the effect of green chemistry lab experiments and the traditional chemistry lab experiments on students’ attitudes towards chemistry. This type of study was a quasi-experiment with a non-equivalent pretest-posttest control group design. The population of this study was all the Class XI of Natural Sciences in SMA Negeri 4 Singaraja, totaling five classes. Samples were selected by a purposive sampling technique. Sciences of 2 and 5 was the control group taught by traditional chemistry lab experiments, while Class XI of Natural Sciences of 3 and 4 was the experimental group taught by green chemistry lab experiments. Students’ attitudes towards chemistry were measured by a questionnaire given to students before and after the chemistry lab experiments. The results of this study indicated that students’ attitudes toward chemistry were better in the green chemistry lab experiments with a mean score of 4.34 than in the traditional chemistry lab experiments with a mean score of 4.15. AbstrakPenelitian ini bertujuan menyelidiki pengaruh praktikum kimia hijau dan praktikum kimia tradisional pada sikap siswa terhadap kimia. Jenis penelitian adalah eksperimen kuasi dengan rancangan non-equivalent pretest-posttest control group. Populasi penelitian ini adalah seluruh siswa Kelas XI IPA di SMA Negeri 4 Singaraja yang berjumlah lima kelas. Sampel dipilih dengan teknik purpossive sampling. Kelas XI IPA 2 dan 5 sebagai kelompok kontrol yang diajar dengan praktikum kimia tradisional, sedangkan Kelas XI IPA 3 dan 4 sebagai kelompok eksperimen yang diajar dengan praktikum kimia hijau. Sikap siswa terhadap kimia diukur dengan inventori yang diberikan kepada siswa sebelum dan setelah kegiatan praktikum kimia. Hasil penelitian ini menunjukkan sikap siswa terhadap kimia lebih baik pada praktikum kimia hijau dengan skor rata-rata 4,34 dibandingkan dengan praktikum kimia tradisional skor rata-rata 4,15.

ABSTRAKPenelitian ini bertujuan untuk mendeskripsikan dan menjelaskan profil model mental siswa, serta menganalisis faktor-faktor yang memengaruhi terbentuknya model mental alternatif siswa kelas X MIA di SMA Laboratorium Undiksha Singaraja pada materi ikatan ion dan ikatan kovalen. Penelitian ini menggunakan pendekatan mix methods, jenis sekuensial. Pengumpulan data dilakukan dengan observasi, tes model mental, dan wawancara. Instrumen yang digunakan adalah tes diagnostik pilihan ganda dua tingkat dan wawancara dengan pertanyaan menyelidik. Hasil penelitian menunjukkan persentase siswa yang memiliki model mental ilmiah tentang ikatan ion dan kovalen sebanyak 53,33% model mental alternatif sebanyak 38,89%, dan 7,78% tidak memberikan tanggapan. Faktor-faktor yang memengaruhi terbentuknya model mental alternatif meliputi kekurangan informasi, kekeliruan penalaran, dan buku teks kimia yang digunakan siswa sebagai sarana belajar. Sehubungan dengan temuan tersebut, guru kimia di SMA perlu menerapkan strategi pembelajaran yang tepat untuk mengajarkan ketiga level kimia secara utuh.Kata Kunci: ikatan ion, ikatan kovalen, model mental, model mental alternatifABSTRACTThis research was aimed to describe and explain the profile of mental model student’s, and analyze the factors that influence the formation of alternative mental models of class X MIA students at SMA Laboratorium Undiksha Singaraja about ionic bonding and covalent bonds material. This research is a mix method approaches in research, a sequential type. Data collection is done by observation, mental model tests, and interviews. The instrument used in this study was a diagnostic test two tier and interview with probing questions. The results showed the percentage of students who experienced a scientific mental model of ion bonds and covalent bonds of 53.33% of students, had an alternative mental model of 38.89%, and as many as 7.78% did not have a mental model. Factors that influence the formation of alternative mental models include lack of information, errors of reasoning, and chemical textbooks that students used. Related with that research, chemistry teachers in high schools need to apply appropriate learning strategies in the process of learning chemistry.Keywords: ionic bonding, covalent bonding, mental model, mental model alternative