The learning process only focuses on the material by memorizing concepts, students have not utilized worksheets to do practical work optimally, so the biology learning process in schools does not encourage students to practice critical thinking skills. This study aimed to determine the effect of implementing STEM-based student worksheets in improving students' critical thinking skills at SMP Negeri 1 Peusangan, Bireuen Regency. This study used a pretest-posttest control group design. The study population was 88 VIII grade students of SMP Negeri 1 Peusangan. The research sample consisted of 67 students. The sample is determined through the purposive sampling technique. The researcher determines the class of the research sample using purposive sampling. The taking of the experimental class and the control class is determined by looking at the standard deviation of the results of the homogeneous pretest of students (the ability of homogeneous students). Critical thinking skills are measured by multiple-choice questions with reason. It is used to determine the increase and difference in the critical thinking skills of students. Analysis of N-Gain test data, paired sample t-test, and independent sample t-test. The results showed that the implementation of STEM-based LKPD could improve students' critical thinking skills on excretory system material in class VIII of SMP Negeri 1 Peusangan. In addition, there are differences in the KBK of students between the experimental class and the control class on the excretory system concept in class VIII of SMP Negeri 1 Peusangan.

Implementation of learning in class 11th MAN 1 and MAN 2 Banda Aceh City Students only get information without going through discussion activities, students who are not brave enough to express ideas or ideas, so that students are not trained in using their critical thinking skills. This study aims to determine the improvement of students' critical thinking skills through the application of the STEM-based discovery learning model to the motion system concept. The research approach used is quantitative with the type of pre-experimental research. The research design used is the one-group pretest-postest design. The population was all of 11th grade students, amounting to 292 people. The sampling technique used was a total sampling. The sample in this study consisted of 292 students. The instruments in this research were pretest and posttest multiple choice questions with reasoned. Data analysis consisted of normality test, paired sample t-test at a significant level of 0.05 and n-gain. The results of the paired sample t-test obtained tcount 48 and value (ρ.001), so it was concluded that there were differences in critical thinking skills and learning outcomes of students before and after learning with the application of the STEM-based discovery learning model to the motion system concept. The results of the n-gain test using the Meltzer formula showed that the gain in critical thinking skills was 0.85, so there was an increase in critical thinking skills with a high category.

This research aims to determine the use of the 5E learning cycle (LC) model in reducing student misconceptions and increasing student learning activities in learning of chemical bonding. The research method used was experimental design with the research design was pretest-posttest control group design. The study population was high school class X students consisting of four classes, and the sample group was determined by purposive sampling technique in order to obtain two classes that became the study sample. The results showed the use of the LC 5E model can reduce student misconceptions, this is indicated from the initial analysis the average percentage of students in the experimental class was 50.66, after applying the LC 5E model to 18.30. Increased student activity in learning activities can also illustrate a decrease in misconceptions. Learning activities of students during the application of the LC 5E model in three meetings obtained by 88%, included in the excellent category. The conclusion in this study is the LC 5E model can reduce misconceptions and increase student learning activities because each stage in the learning process directs students actively and creatively.

Learning  science in Junior High School in Pidie district has not yet developed the ability to think scientifically. Leanears have not been able to do a problem analisis and argue with the evisidence and experience of the investigation. That are not given the opportunity to have learning activities that could improve their thinking, and then the equipment used in the process of teaching and learning on the concept of plants and animals reproduction are inediquate. It is proved by the laboratory space that has not been used and incompleted equipment. This study aims to determine the differences in the implementation of integrated STEM learning and STEM Silo on the ability to think scientifically on plant and animal reproduction concept in class IX Pidie State Junior High School. The approach used in this study was quantitative, the type of research was applied research; the method used is quasi-experimental, with the Nonrandomized control group pretest-posttest design. The population in this study amounted to 236 students and the sample to 75 students. The research procedure consisted of giving pretest, giving STEM integrated treatment in the experimental class and STEM silo in the control class, and giving posttest. The instrument for measuring scientific thinking ability is to use essay tests accompanied by rubrics. Data analysis consisted of normality test, independent t-test and ANOVA test. The results of the study showed there are diffences in the average value of scientific thinking integrated STEM class that is76.74 and STEM silos 61.64. The research is aimed at differing students ability to  scientific thinking. The students are taught by using integeted STEM learning and STEM silo in the reproduction of animal plant material grade IX SMP

The learning process has not emphasized the development of skills; this is because in learning students tend to memorize concepts so that learning outcomes and self-efficacy are not trained optimally. The formulation of the problem in this study is: is there a difference in learning outcomes and student self-efficacy between the use of the Problem Base Learning model combined with the E-STEM-based Student Worksheet with the Problem Base Learning model on environmental pollution material at MAN Banda Aceh? This research is quantitative with an experimental research approach. The research design used was pretest-posttest control group design. The population of this study was all students of class X MAN 3 Banda Aceh, totaling 84. The sampling technique used a total sampling of 84 students. The instrument used to measure learning outcomes is multiple choice questions using 30 questions and self-efficacy is measured using a questionnaire. Data analysis of learning outcomes and self-efficacy of students using independent sample t-test at a significant level of 0.05. The results showed that there were differences in student learning outcomes and self-efficacy after applying the Problem Base Learning model combined with the E-STEM-based Student Worksheet on environmental pollution materials at MAN Banda Aceh

Self-efficacy memiliki kontribusi penting dalam proses pembelajaran karena dapat digunakan sebagai prediktor kinerja belajar siswa. Self-efficacy mampu merangsang motivasi, proses kognitif, aktivitas, prestasi dan ketekunan siswa. Kurangnya kemampuan efikasi diri merupakan salah satu masalah yang sering terjadi dalam pembelajaran. Permasalahan ini dapat diatasi melalui penerapan media pembelajaran seperti penggunaan modul inovatif. Penelitian bertujuan untuk mengetahui pengaruh penerapan modul pembelajaran berbasis masalah terhadap efikasi diri dan hasil belajar siswa. Selain itu juga bertujuan untuk melihat hubungan antara efikasi diri dengan hasil belajar akibat penerapan modul pembelajaran berbasis masalah materi sistem pencernaan. Penelitian ini dilaksanakan pada semester genap tahun ajaran 2020/2021 di sebuah sekolah menengah atas di Kabupaten Aceh Barat, Aceh, Indonesia. Penelitian ini menggunakan metode eksperimen dengan desain pretest posttest non-equivalent control group design. Sampel penelitian adalah 93 siswa (total sampling). Instrumen yang digunakan dalam penelitian ini terdiri dari angket efikasi diri dan tes kognitif materi sistem pencernaan. Data efikasi diri dan hasil belajar dianalisis dengan uji statistik parametrik menggunakan analisis kovarians, sedangkan efikasi diri dianalisis menggunakan persentase. Hasil penelitian menunjukkan bahwa penerapan modul pembelajaran berbasis masalah berpengaruh terhadap efikasi diri dan hasil belajar siswa. Selain itu, analisis korelasi menunjukkan bahwa r hitung r tabel (0,7277 0. 2461) yang mengartikan adanya hubungan yang signifikan antara efikasi diri dengan hasil belajar siswa. Efikasi diri berpengaruh positif terhadap prestasi belajar siswa: semakin tinggi efikasi diri maka hasil belajar akan semakin tinggi

Fern is one of vegetation groups in the area of Suhom Waterfall, Lhoong District, Aceh Besar, Aceh, Indonesia. The study was aimed to determine the species of Pteridophyta scattered in the Suhom Waterfall Area, Lhoong District, Aceh Besar and their feasibility as a learning media of the Botany of Non-Vascular Plant course. The qualitative approach was used in this survey study. The research location was divided into three stations, Station I (the area above the waterfall), Station II (around the pool), and Station III (the river flow). Data were analyzed descriptively and the results showed that there were 33 species of Pteridophya that were classified into 4 Classis and 14 Familia. The Classis and Familia were Filicinae (Aspleniaceae, Anthyriaceae, Blechnaceae, Davalliaceae, Dropteridaceae, Glecheniaceae, Marceliaceae, Polypodiaceae, Pteridaceae, Schizaceae and Thelipteridaceae), Lycoopodiinae (Selaginellaeae), Lycoopodiinae (Selaginellaeae), and Psilotinae (Psilotaceae).

Etnobotani merupakan ilmu yang mempelajari tentang tumbuhan yang digunakan manusia untuk keperluan sehari-hari dan pola pemikiran masyarakat terhadap sumber daya nabati yang ada di sekitar tempat tinggalnya. Penelitian ini bertujuan mengetahui jenis, kategori konservasi dan upaya konservasi tumbuhan yang dimanfaatkan sebagai bahan upacara adat masyarakat di Kecamatan Blangkejeren Kabupaten Gayo Lues. Penelitian ini merupakan penelitian despriptif kualitatif. Metode yang digunakan dalam penelitian ini adalah wawancara dan survei ekploratif. Penelitian dilaksanakan pada bulan April 2019. Hasil penelitian menunjukan bahawa terdapat 23 spesies tumbuhan yang dimanfaatkan untuk kepentingan upacara adat. Kategori konservasi tumbuhan yang digunakan sebagai bahan upacara adat adalah resiko rendah (75%). Masyarakat melakukan kegiatan penanaman tumbuhan yang digunakan sebagai bahan upacara adat di perkarangan rumah dan kebun sebagai upaya konservasi