Guiding students how to think critically and creatively is a crucial part of the educational process in order to meet the required skills to face the 21st century. In addition, attention to the local culture especially that is closely related to the scientific concepts needs to be strongly emphasized. Due to those two aspects i.e. creative and critical thinking as well as attention to local culture, the ethno-STEM project-based learning for high school students has been implemented and its impact to students’ critical and creative thinking skills has been investigated. This study involved 230 students from seven high schools in Central Java Indonesia. The data collection was carried out through a set of instruments to reveal the students’ critical and creative thinking skills. The instruments were declared as valid based on the experts’ judgment and showed an Alpha Cronbach score of 0.79 prior to use. The results showed that the ethno-STEM project-based learning was able to improve the average critical and creative thinking skills of students in all indicators varying from low to medium categories. The improvement of students' critical thinking skills was observed by the achievement of the N-gain score, i.e. 52 students (22.6%) achieved a high category, 102 students (44.4%) achieved a medium category, and 76 students (33.0%) achieved a low category. Moreover, an increase in the creative thinking skills was also observed, indicated by the N-gain score, i.e. 63 students (27.4%) were at a high category, 109 students (47.4%) were at a medium category, and 58 students (25.2%) were at a low category. In conclusion, the ethno-STEM project-based learning showed a significant effect on the improvement of students' critical and creative thinking skills.

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The purpose of this study is to improve the ability to think creatively, make pyrolysis devices and make fuel oil from plastic waste. This research is a classroom action research conducted in 3 cycles with the stages of each cycle which includes 4 stages, namely observation, process, observation and reflection. The research subjects were students of class XI IPA 3 SMA Negeri 14 Semarang as many as 34 people who entered 12 sons and 22 girls. Data collection uses test instruments and measurement of creative thinking abilities and student response questionnaires. The data were analyzed descriptively and from the results of research that showed fluency, flexibility, originality, and elaboration after the application of hydrocarbon and petroleum learning. The results show that the average way of thinking of students is inthecreativepredicate.withahighincreaseineachindicatoroffluencyandelaboration

SMA Negeri 14 Semarang 2) Abstrak-Penelitian ini bertujuan menganalisis kemampuan kognitif dan berpikir kreatif siswa melalui penerapan pembelajaran berbasis proyek berpendekatan STEM. Penelitian ini merupakan studi kasus dengan desain One-Shot Case Study. Subyek penelitian adalah siswa kelas XI IPA SMA Negeri di Semarang sebanyak 36 siswa. Pengumpulan data menggunakan instrumen tes yang telah divalidasi oleh ahli. Hasil analisis menunjukkan bahwa kemampuan kognitif siswa mencapai kriteria baik, dengan ketercapaian tertinggi pada indikator pemahaman konsep dan kemampuan berpikir kreatif siswa mencapai kriteria baik dengan ketercapaian tertinggi pada indikator kemampuan memandang informasi dari sudut pandang yang berbeda.

Various species of medicinal plants in Indonesia commonly used by residents as herbal medicine. Indigenouse knowledge of herbal medicine has never been scientifically researched, whether it is related to the benefits, the technology of manufacture, the effort of obtaining qualified herbs, and the compound components in medicinal plants. The purpose of this study was to document information and saintification about ethnomedicine in Semarang City, Central Java, Indonesia. This is a qualitative study, with data collection techniques through field studies to the research sites to gather information from traditional drug makers through semi-structured interviews and field observations. The data obtained is further analyzed to obtain a scientific explanation. The focus of this research is the type of traditional herbal products, how to make herbs, composition making, and how to produce the best herbal medicine based on information from traditional medicine maker. Two types of traditional herbal medicine are analyzed. Each type of traditional herbal medicine is described from the aspect of benefits, the main compound, the way of making, the creative idea aspect to produce the best herbal medicine, and the best material composition.