Research has been conducted to investigate the influence of the Science Technology Society (STS) learning model which is assisted by social media Facebook (FB) in science learning. This research was conducted in a group of junior high school students in Tondano, North Sulawesi, Indonesia. The research method is a Quasi-Experiment Posttest-Only Control Group Design. The experimental group was treated with the STS learning model assisted by FB, and the control group with lectures, discussions, question, and answer. The number of samples in the experimental group consisted of 25 students and the number of samples in the control group was 25 students. The results of the statistical analysis concluded that there was an influence of the STS learning model with the help of Facebook social media on improving student learning outcomes in science learning in junior high school students. The research data showed that the average post-test score of student learning outcomes in the experimental group was 88.5 higher than in the control group score was only 68.9. The implication of the research results is that the use of Facebook social media in the learning process will make teachers and students interact not only in the classroom. In addition, the STS learning model arouses students’ interest in science learning, especially related to strengthening scientific literacy

Mangrove Biodiversity of Bunaken National Park in Project-Based Learning to Improve Students' Competitive Skills during the COVID 19 Pandemic. College graduates in the era of the industrial revolution 4.0 are required to have strong competitive abilities. Competitive skills can be measured from the science process skills possessed.Objectives: This study aims to obtain a competitive profile of students' skills through a project-based learning method on mangrove biodiversity in Bunaken National Park, North Sulawesi. Methods: The research subjects were students who took Sulawesi biodiversity courses in 2020/2021. Fourteen science process skills were measured using a rubric Findings:The results showed that students' mastery of science process skills was high in the Sulawesi biodiversity course. Conclusion: . The application of project-based learning to the problem of mangrove biodiversity in Bunaken National Park can induce students to develop problem-solving skills, collaboration, creativity, and literacy skills.

The house fly (Musca domestica) is a vector of mechanical transmission of infectious diseases such as diarrhea, dysentery, cholera, typhoid. One way to control house flies is to use plant-based insecticides. Papaya leaves (Carica papaya L.) can be used as insecticides because of the enzymes saponins, flavonoids, and papain which are toxic to insects. This research aims to determine the effectiveness of papaya leaf extract as a natural insecticide for house flies. The concentration of papaya leaf extract used was 0%, 30%, 40%, 50%, and 60% with 3 replications. Each treatment unit contained 10 house flies. Extract application by spraying directly on house flies. The number of house fly deaths was calculated at 1, 2, 3, 4, 5, 6 and 24 hours. Data were analyzed using One Way Anova test. The result of this research was all the sig values are 0.00 < 0.05, which means that there was a significant difference in the number of house flies deaths at each concentration. In conclusion, the most effective concentration of papaya leaf extract to kill 100% of house flies was at a concentration of 60% after 6 hours of treatment.Keywords: house fly; natural insecticide; papaya leaf ABSTRAKSalah satu vektor penularan penyakit menular mekanis seperti diare, disentri, kolera, tipes adalah lalat rumah (Musca domestica). Salah satu cara pengendalian lalat rumah adalah menggunakan insektisida nabati. Daun pepaya (Carica papaya L.) mengandung enzim saponin, flavonoid, dan papain yang bersifat racun bagi serangga sehingga dapat digunakan sebagai insektisida alami atau insektisida nabati. Tujuan dari penelitian ini adalah untuk mengetahui efektivitas ekstrak daun pepaya sebagai insektisida nabati lalat rumah menggunakan 5 perlakuan konsentrasi ekstrak kasar daun pepaya yakni 0%, 30%, 40%, 50%, dan 60% serta 3 ulangan, setiap unit perlakuan menggunakan 10 ekor lalat rumah, aplikasi ekstrak kasar daun pepaya dengan cara disemprotkan pada lalat rumah, jumlah kematian lalat rumah dihitung pada jam ke-1,2,3,4,5,6 dan 24 jam setelah aplikasi. Data dianalisis menggunakan uji One Way Anova. Hasil penelitian diperoleh semua nilai sig 0,00 < 0,05 yang berarti terdapat perbedaan bermakna jumlah kematian lalat pada setiap pemberian konsentrasi ekstrak daun pepaya. Hasil penelitian menunjukkan bahwa konsentrasi ekstrak daun pepaya yang paling efektif untuk membunuh 100% lalat rumah adalah konsentrasi 60% setelah 6 jam perlakuan.Kata kunci: daun pepaya; insektisida alami; lalat rumah

This study aimed to determine the effects of project-based learning in the Covid-19 pandemic era on biology students' metacognitive and critical thinking skills in the genetics concept. The research model used was a quasi-experimental design. The population in this study were fifth semester students who offered genetics courses consisting of 4 classes A to D. Samples were taken randomly, that is classes A and B. The data were analyzed using the Anacova. The results show that students with the PjBL model have better metacognitive skills and thinking skills than those with conventional learning models. The PjBL model could be used as a reference to improve the metacognitive and critical thinking skills. Therefore, further research can be used to examine PjBL learning models on other higher thinking skills such as collaboration skills, problem-solving skills, and creative thinking skills.                                                          Keywords: project-based learning, metacognitive skills, critical thinking skills, genetic study