THE EFFECTIVENESS OF PROBLEM BASED LEARNING MODEL BASED ON ETHNOSCIENCE ON STUDENT’S CRITICAL THINKING SKILLS

The purpose of this study was to determine the effectiveness of the problem-based learning model based on ethnoscience on students' critical thinking skills on colloidal material. Experiments were conducted on a sample of 36 experimental class students with an ethnoscience-based problem-based learning model and 36 experimental class students with a convention learning model. This research method is a quasi-experimental design with a nonequivalent control group design. The instruments used are essay tests and observation sheets. The results of this study indicate that the average posttest in the experimental class is 76.08, which is higher than the control class, which is 69.33. These results indicate that the use of ethnoscience-based learning problem-based learning models on colloidal material is effective in improving students' critical thinking skills compared to using conventional models.

IMPLEMENTATION OF PROBLEM BASED LEARNING TO TRAIN CRITICAL THINKING SKILLS STUDENTS AT BASIC ACID MATERIALS

This research to describe implementation of Problem Based Learning models, activities students, and critical thinking skills (CTS) in learning using PBL models on acid-base material. The design used is One Group Pretest Posttest Design with 32 subjects. This study resulted is: (1) implementation of learning using PBL model get the results of the average value sequentially at meetings one and two of 3.60 and 3.76, with very good criteria (2) Students perform relevant activities meaning of students have practiced CTS. The relevant activities of students in sequence at meetings one and two of 98.75% and 97.7%. (3) CTS learners experienced an increase, overall the pretest and posttest scores of students received a percentage of 90.63% students in high category and 9.38% in medium category. The percentage of component of interpretation, inference, and analysis in high category are as follows 78.13%; 81.25%; 90.63%, and the medium category 21.88%; 18.75%; 9.28%.

OPTIMIZATION OF MICROSOFT OFFICE 365 FOR BLENDED LEARNING-BASED LEARNING IN NATURAL SCIENCE SUBJECTS

Blended learning is one of the innovative learning models that integrates technology in line with the demands of learning in the 21st century and is relevant to learning in the pandemic era. Microsoft Office 365 is an office cloud application from Microsoft such as the desktop version of Microsoft Office that allows users to access e-mail, documents, contacts, calendars and collaborate anywhere and using various devices. This technology is one of the technologies that can help the learning process run with the Blended Learning model. The purpose of this study is to review the optimization of Microsoft Office 365 in Blended Learning-based learning. The type of research used is research with literature study method.

DEVELOPMENT OF TEACHING MATERIALS FOR HANDLING HAZARDOUS AND NON HAZARDOUS WASTE BASED ON SETS

The purpose of this study is to obtain the feasibility of teaching materials that handle hazardous and non-hazardous waste based on Science, Environment, Technology, and Society (SETS). The research design used refers to the 4-D development model (four-D Models) recommended by Thiagarajan which consists of four stages, namely define, design, develop, and disseminate, which is limited to the development stage. The samples in this study were 34 students of class X 2 SMK Negeri 5 Surabaya. The results showed that the validity of teaching materials obtained a percentage of 83,27% with a very valid category, observation of students 97.62% was very practical, the test of student learning outcomes increased with the acquisition of N-Gain of 0.7 in the category high, as many as 100% of students achieve mastery learning and the questionnaire responses of students as much as 90.59% are very practical. This shows that SETS-based teaching materials on hazardous and non-hazardous waste handling materials for vocational high school students are proper to be used in the learning process.

VALIDATION OF THERMOCHEMISTRY SUPPLEMENT BOOK BASED PROBLEM SOLVING TO TRAIN STUDENTS METACOGNITIVE SKILLS

This research aims to know validity of thermochemistry suplement book based problem solving to train students metacognitive skills includes the content and construct. Content validity includes the suitability of the material and questions. Construct validity includes presentation and readability techniques. Problem solving model has 4 steps, that are understanding the problem, devising a plan, carrying out the plan, and lock back. Metacognitive skills consist of 3 components, namely planning, monitoring, and evaluating. The type of research used is the Research and Development (R&D) from Sugiyono. The supplement book was assessed by 3 experts in the field of chemical education using a validation instrument. The results showed that a chemical supplement book based on problem solving to train students' metacognitive skills on thermochemical material was very good with a score of 91.6% in content validation and 84.9% in construct validation.

THE EFFECT OF GUIDED INQUIRY MODEL ON HIGHER ORDER THINKING SKILLS REVIEWED FROM CHEMICAL LITERACY

The change in the educational paradigm in the 21st century requires students to have good basic knowledge and understanding to develop Higher Order Thinking Skills (HOTS). Chemical equilibrium is an abstract material and complex, so it requires good thinking skills to understand the concepts. This Study aims to determine the effect of the application of guided inquiry models on HOTS in chemical equilibrium. This research uses Pre-Experimental Design with One Shot Case Study model with 25 students of Billfath University as subjects. The data were collected using the HOTS test instrument in the form of 15 multiple choice questions. Hypothesis testing used the Independent Sample T-test (non-parametric). The results showed (1) the high-level learning outcomes of students with high initial abilities were better than students with low initial abilities, (2) there was a significant effect of applying the model Guided inquiry learning towards student high-level learning outcomes.

IDENTIFY MISCONCEPTION ON REACTION RATE CONCEPT USING FOUR-TIER MULTIPLE CHOICE (4TMC) DIAGNOSTIC TEST INSTRUMENT

The aims of this study to identify the profile of students’ conseptions and misconceptions on the concept of reaction rate using a four-tier multiple choice diagnostic test instrument reported in the form of misconception profiles consisting of students' conceptions, students' misconceptions and the causes of misconceptions experienced by students. Based on the results of the study shown (1) the students’ conception profile is as much as 78% understand the concept, 21% misconceptions and 1% do not understand the concept, (2) the profile of student’s misconceptions in each sub-material that misconceptions on sub-material of concentration 16%, temperature 19%, surface area 41% and catalyst 24% and as many as 1 student (3%) including the high misconception category, 22 students (67%) included in the medium misconception category and 10 students (30%) were in the low misconception category. Students’ misconceptions vary in different causes such as; associative thinking 59%, preconceptions 25%, incomplete resoning 13%, humanistic thinking 2% and incorrect intuition 1% . Keywords: four-tier multiple choice, misconception, reaction rate

IMPLEMENTATION OF COOPERATIVE LEARNING MODEL NHT TO TRAIN STUDENTS COMMUNICATION SKILL IN ACID BASE MATTER

The aim of this research is to description the implementation of cooperative learning model NHT, students activity and practice communication skills through material of acid base. The research design used is “One Shoot Case Study”. Research data obtained include (1) Implementation of cooperative learning model NHT to get a score at meetings 1, 2, and 3 of 3,86, 3,90, and 3,95 with very good category. (2) The percentage of students activities that are relevant is greater than the of activities that are irrelevant. (3) Communication skills of students who are trained obtain sufficient criteria on the quantity of questions with a percentage for three consecutive meetings of 25%; 44,44%; and 55,56% and the quantity of opinion students get a good assessment criteria of 41,67%; 61,11%; and 75%. On the quality of asking students get an excellent title for three consecutive meetings 8,33%; 11,11%; and 25% and the quality of opinion students of 5,56%; 25%; and 27,78%.

Learning Media Design based on Traditional Game of Tumbu-Tumbu Belanga (T2B) on Salt Hydrolysis Topic

This research aimed to test the validity of the feasibility of traditional game learning media on salt hydrolysis. This research was development research (R&D) with a qualitative descriptive approach. This research uses the ADDIE model development design, which consists of 5 (five) stages, namely (1) analysis, (2) design, (3) development, (4) implementation, and (5) evaluation. Data collection techniques in this study used a validation sheet for the assessment of the feasibility of tumbu-tumbu learning media. The tumbu-tumbu learning media validation wass assessed by 4 expert validators, namely 2 chemistry lecturers of State University of Gorontalo material experts, 1 media expert lecturer, and 1 high school chemistry teacher. The results of the validation of tumbu-tumbu learning media development obtained an average percentage 0f 89.40%, which was categorized in very feasible criteria. Therefore, the tumbu-tumbu learning media are highly usable in the learning process of salt hydrolysis.

PEMBUATAN MODUL PEMBELAJARAN BERBASIS LITERASI SAINS KAJIAN KOLOID PADA PROSES PEMBUATAN EDIBLE FILM BERBAHAN DASAR KULIT BUAH NAGA

Penelitian ini bertujuan untuk menghasilkan modul pembelajaran audio visual berbasis literasi sains yang merupakan kajian materi koloid SMA Kelas XI Kurikulum 2013 pada proses pembuatan edible film kulit buah naga. Metode penelitianyang digunakan dalam penelitian ini adalah Deskriptif dengan pendekatan kuantitatif. Analisis data dilakukan dengan uji kelayakan modul berupa angket pada ahli materi dan ahli media. Berdasarkan analisis datahasil penelitian menunjukkan, bahwa hasil rata-rata presentase kelayakan materi sebesar 90% termasuk kedalam katagori sangat layak dan hasil rata-rata presentase kelayakan media sebesar 83% termasuk kedalam katagori sangat layak. Dari penelitian ini dapat disimpulkan bahwa rata-rata kelayakan memiliki persentase sebesar 86,5% dengan katagori sangat layak.