Utilization of pineapple is always focused on consumption for fresh fruit and animal feed. many people do not know the other benefits of pineapple. The presence of protease enzymes in it, increasing its utilization. The enzyme is bromelin, which can be obtained by isolating it from pineapple. For this reason, the aim of this study is to isolate the crude bromelain enzyme based on the maturity level of pineapple and then test its proteolytic activity. Pineapple was blended, then the filtrate was deposited, then centrifuged to obtain crude bromelain which is dried by the drying method and tested for its activity using milk substrate. The results showed that old pineapple is the best level of maturity and the sun is the best drying method with proteolytic activity of 0.053 and 0.056 MCU/mg respectively. Its optimum activity is pH 5.8 and 55 oC.

It is no doubt that information technology has played significant importance in higher education in particular in the era of the 4.0 industrial revolution. The progress in technology is expected to support and facilitate the teaching and learning process. One information technology product that can be used is a learning management system (LMS) such as Schoology. Schoology offers all the tools in classroom management which are needed to create interesting content, support learning activities, and assess student understanding. However, the platform itself being used in a chemistry classroom is still rarely found. For this reason, the purpose of this study is to investigate chemistry classroom management using LMS Schoology. A quantitative-descriptive analysis was used to analyze data. Registered inorganic chemistry undergraduate students (n = 52) of semester IV participated in this study. The data was collected using a 28-items questionnaire which accumulated the perception of students regarding chemical class management using Schoology. The results of the study showed positive responses toward that management of teaching materials, management discussions, assignments, quizzes/exams, management of communication and ultimately interaction using LMS Schoology aced the chemistry classroom management.

Pengelolaan kelas dalam proses pengajaran khususnya mata pelajaran kimia akan menjadi signifikan agar hasil belajar menjadi optimal. Namun kegitan pembelajaran yang dilaksanakan saat ini kurang optimal sedangkan berdampak pada hasil belajar. Penelitian ini bertujuan untuk menganalisis persepsi mahasiswa dalam manajemen kelas mata kuliah kimia anorganik. Jenis penelitian ini yaitu penelitian kuantitatif. Metode dan instrument yang digunakan untuk mengumpulkan data yaitu instrument. Subjek penelitian ini adalah 40 mahasiswa. Teknik yang digunakan untuk menganalsis data yaitu analisis deskriptif kualitati dan kuantitatif. Hasil penelitian menunjukkan bahwa persepsi mahasiswa tentang GC berada pada kategori memuaskan dan merekomendasikan GC untuk digunakan dalam pelajaran lain. Effect size dihitung dari perbedaan rata-rata pre-test dan post-test sebelum dan sesudah pembelajaran dengan menggunakan rumus Cohen dan diperoleh efektivitas GC menurut kriteria Cohen adalah 1,77, yang berarti bahwa ukuran efek Google Classroom luas; maka GC sangat efektif digunakan dalam mengajar mata kuliah kimia anorganik. Disimpulkan bahwa pengelolaan kelas melalui sistem instruksional berbasis WEB efektif digunakan dalam pembelajaran.

Creativity problems are now considered a crucial ability/skill for the future of education and work. Currently, creativity is seen as urgently needing to be improved in the learning process to achieve better learning quality. This research was a descriptive-qualitative that aims to describe the utilization of Hyperdocs towards scientific creativity of SMA Labschool UNTAD Palu students in chemistry learning on the buffer topics The research subjects consisted of 20 students who were obtained based on a purposive sampling technique. The data collection instrument used hyperdocs-based worksheets which consisted of 14 scientific creativity questions that had been validated by a team of experts. Based on the analysis of percentage data and the category of scientific creativity, the test questions in the first and second sessions showed that the average scores for the aspects of unusual uses, problem finding, product improvement, creative imagination, and problem-solving were in a good category. Furthermore, the science experiment and product design aspects are in the sufficient category. So that it can be said that overall the scientific creativity of SMA Labschool UNTAD Palu class XI MIA 1 is in a good category.

The research is purposed to describe the problem-solving ability of the Senior High School XI grader students in Palu city. The measurement of the problem-solving ability could be determined by solving the exercises of Hydrocarbon and Thermochemistry topics using the Polya’s sequences; consisting of understanding the problem, devising, doing the plan, and evaluating. The ability of students’ problem solving is classified well in every sequence in case of the number of high category students is 60%. The samples are 240 of 507 XI grade students learning chemistry in SMAN 3 and SMA Madani Terpadu in Palu City. The data of problem-solving is determined by providing a test in the form of a validated assay. The result shows the average of XI graders in Palu City only capable of solving the problem without understanding, devising, and evaluating while solving hydrocarbon topics. The ability is not even possessed by students in Thermochemistry. It implies that senior high school students in Palu could not represent the problem in the form of figure, symbol, statement, and mathematics statement or have not been able to devise the problem solving and correlate the obtained result with the related theory or concept. Therefore, the students should be trained to solve the problem in learning by application the problem-solving sequences.

This study aims to improve student achievement in learning chemistry in class X MIA4 at SMA Negeri 1 Palu by applying the Jigsaw Cooperative Learning Model. The Classroom Action Research (CAR) problem can be formulated as follows: Is the Jigsaw Cooperative Learning Model application able to improve student achievement in learning chemistry in class X MIA4 SMAN 1 Palu? CAR is carried out with the following stages to answer the problem: 1. Planning, 2. Implementation. 3. Observation, and 4. Evaluation and Reflection. The study results can be explained as follows several fundamental aspects of learning were successfully improved by applying the Jigsaw Cooperative Learning Model. Such as student activity in collaboration and in completing worksheets independently, actively asking and answering questions, and making students feel happy and enthusiastic. Likewise, the average evaluation of each cycle showed that the % completeness increased. In cycle one, action one was 73.8%, action two 85.5%, and activity three 92.9% increased in cycle two, the average from three actions to 98.0%. It can be concluded that the application of the Jigsaw Cooperative Learning Model can improve student achievement in class X MIA4 SMA Negeri 1.

This study aims to develop practical and effective student worksheets based on Hyperdocs on the collaboration skills of fifth-grade elementary school students in science learning. The development applied an instructional design that was performed in the semester of the 2020/2021 school year involving 28 students (13 male and 15 female). Data collection techniques include a pretest/posttest (10 questions of multiple choice), observation of student and teacher activities, and a questionnaire for students' collaboration skills. The indicators of collaboration skills were contributing actively, working productively, showing flexibility and compromise, managing projects well, showing respect, and showing responsibility. The results showed that the expert assessment of the student's worksheet Hyperdocs-based was 75% with valid criteria, the expert assessment of the practicality of 93.75% in the valid category, the results of the expert assessment on the student response questionnaire the average acquisition of 94.17 valid categories. The developed Hyperdocs-based worksheets have practical values in implementing learning at meetings 1 and 2 of 88.16% and 87.50% with very practical criteria. The student's worksheet Hyperdocs-based development was effective in science learning which was 0.78 with high criteria.

Honesty and responsibility should be a principle held by students. But, there are still problems of dishonesty and irresponsibility of students during exams. This study aimed to analyze the honesty and responsibility character of chemistry students during exams. The research samples were 39 students. Data were collected by observation and interviews technique, by using observation and questionnaires sheets. Data were analyzed by using descriptive statistics. The results showed that the honesty and responsibility of chemistry students were in the sufficient category where the percentage of honesty and responsibility of students based on the observation sheets was 43.6% and 49%, respectively. While the questionnaire responsibility students were 46.2% and 43.6%, respectively.