Penelitian ini bertujuan untuk mengetahui pengaruh minat belajar siswa dengan menggunakan metode pembelajaran praktikum sederhana. Alat praktikum yang digunakan  pada proses pembelajaran dibuat sendiri oleh peneliti menggunakan bahan-bahan yang mudah didapatkan di lingkungan sekitar dan bersifat lebih ekonomis. Penelitian ini merupakan penelitian kuantitatif true experimental design. Teknik pengambilan sampel dengan  simple random sampling diperoleh 30 sampel yang terbagi menjadi kelas eksperimen dan  kelas kontrol dengan cara pengundian lot nama siswa. Pengambilan data minat belajar siswa menggunakan angket tertutup (angket minat)  skala likert. Teknik analisis data menggunakan analisis inferensial. Analisis statistik inferensial menggunakan  uji asumsi dan uji hipotesis. Uji asumsi digunakan uji normalitas dan homogenitas. Hasil perhitungan uji hipotesis menggunakan uji-t menunjukkan nilai thitung= 3,669 . Nilai thitung dikonsultasikan dengan harga ttabel pada taraf signifikan 5% dan dk= 28 yaitu sebesar 1,701. Nilai ttabel < thitung hal ini menunjukkan bahwa uji hipotesis menerima Ha yang menyatakan bahwa terdapat pengaruh positif signifikan metode praktikum sederhana pada materi kepolaran senyawa terhadap minat belajar siswa kelas X SMA.

Limited laboratory facilities are an important factor causing the low quality of chemistry learning. Therefore, the necessity to develop innovative media is evitable, in particular in the form of simple practical tools made from materials that are easily found in everyday life. If the quality of learning can be improved, then it may encourage students' interest in learning in chemistry. This article reports on the development of an instrument (questionnaire) of students' interest in chemistry lessons at school. The development begins with an analysis of the factors that influence interest in learning from the available literature; and the analysis resulted in 4 (four) indicators of interest, namely (1) happy feeling, (2) interest in performance, (3) attention, and (4) involvement. These four indicators then were developed into relevant questionnaire statements to determine students' perceptions of chemistry learning at school. To test the validity of the contents of the questionnaire, expert validation was carried out by 3 experts in the field of educational psychology. The results of expert validation were then analyzed with the Aiken V formula after previously converting the data into interval data. The results of the analysis show that the value of V ranges from 0.72 to 0.82 which means in the good category for all indicators of interest. In conclusion the student learning interest questionnaire is feasible and ready to be used to determine the effect of innovative learning on student learning interest.

The harmful effects of exposure to light (UV) can be prevented by using sunscreen. This study aims to determine the best formulation contained in various herbal plants to be used as a manufacturing material sunscreen. The method in this study is the study of literature from the research journal database on the internet, namely through google scholar and Proquest University of Mataram. Sunscreens are assessed in terms of light protection factor expressed by the SPF value (Sun Protection Factor) to determine the effectiveness of sunscreen preparations or the ability to withstand UV rays. Several types of herbal plants that grow in various regions in Indonesia contain photoprotective bioactive compounds. Aromatic ginger (Kaempferia galanga L.) is a herbal plant widely used as an ingredient in sunscreens with a high protection category. Cinnamic derivatives, namely ethyl para-methoxycinnamate (EPMS), are one of the compounds contained in aromatic ginger and can be used as a manufacturing material sunscreen that is good and safe for the skin.