Students' learning challenges brought on by an inadequate learning process served as the inspiration for this study. Students struggle to categorize alkaline, alkaline earth, halogen, and noble gas elements as a result. The activities, learning outcomes, and student reactions to the card sort learning model on the main group elements content are all intended to be described in this study. Descriptive study using a qualitative approach is the methodology employed. 21 students from SMAN 1 Krueng Barona Jaya's class XII MIA-2 chosen as the research subjects. Student activity observation sheets, test question sheets, and student answer questionnaires were the tools utilized in this study. Observing student activities in the first, second, third, and fourth meetings yielded results that fell into the good category: 71.02%, 75%, 78.26%, and 83.65%, respectively. 76.19% of students on average demonstrated competence of the learning goals. Eighty-three percent of students responded favorably to instruction utilizing the card sort learning model. Based on the study's findings, it can be said that using the card sort learning model with the primary group elements content can engage students in the learning process and help them master the subject matter. Additionally, students responded favorably to the use of the card sort learning model.

Corn is a popular ingredient in facial skin care products. Corn contains thiamine, which can dry wounds and eliminate acne scars that appear as holes on the face or black spots. Corn starch is made into a gel mask with the gelling ingredient hidroxy prophyl methyl cellulose (HPMC). This research intends to establish if a gel mask manufactured from sweet corn starch (Zea mays saccharata) can meet the requirements of the physical quality test assessment results, as well as the stability requirements. The research approach is experimental, employing a sample gathering methodology known as purposive sampling. The evaluation of gel mask preparations includes evaluating the physical quality of the preparations, irritant testing on 10 participants, and drying time tests on the preparations. The evaluation of the preparations revealed that all gel mask formulations were semi-solid gels with a yellowish white color and a distinct corny smell. The results were homogeneous, with an average pH of 7.5–7.7, spreadability of 5–7 cm, and viscosity of 22133-67566. The preparation also exhibited stable stability at room temperature and did not irritate volunteers' skin. Therefore, both the stability requirements and the physical quality test assessment results are satisfied by the preparation.

Although natural rubber has many good qualities, its commercial uses are limited by its low chemical reactivity and low heat stability. A derivative with better stability, Cyclic Natural Rubber (CNR), has to be chemically modified to increase its usefulness and broaden its range of applications. Investigating the effects of two different methods, the melt processing and solution system on the FTIR spectra of Cyclic Natural Rubber (CNR) graft copolymerization with Glycidyl Methacrylate (GMA) was the aim of this work. Additionally, an evaluation of the effect of Dicumyl Peroxide (DCP) and Benzoyl Peroxide (BPO) initiators on grafting results was carried out. According to FTIR spectrum analysis, the carbonyl ester (C=O) peak at roughly 1721 cm⁻¹, indicating effective grafting, was more pronounced in the melt processing approach than in the solution procedure. This implied that melt processing resulted in higher grafting efficiency. The absorption bands in the C-H stretching region (2860-2921 cm⁻¹) and the C=C stretching area (1672 cm⁻¹) show that the underlying structure of CNR has not degraded. The carbonyl index values for each composition showed that BPO performed better than DCP in the melt treatment method, however DCP as an initiator in the solution system produced a higher grafting efficiency than BPO.

A flipbook with augmented reality based on ethnoscience, supported by Heyzine and Assembler, contains nanotechnology content for high school students. It is an interactive learning media in the form of an electronic book that contains photos, text, and animated content designed to assist students in learning the material through the visuals offered. Page flipping has a transition effect that helps students read each page and increases their learning use. Applied visual arts ethnoscience exemplifies the combination of community culture and science. Augmented reality is utilized to show objects in 3D and realistically related to the ethnoscience of applied fine arts in the Cirebon area, such as the scissor-grip home, megamendung batik, ceramics, masks, kujang, and paintings. The goal of this research is to develop digital teaching materials that can adjust to evolving technologies in order to increase educational quality. The data was collected using a quasi-experimental one-group pretest-posttest design for a total of 30 students, which was then processed using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation) using descriptive statistics. This study found that students had good perceptions of the presence of a flipbook media with AR based on ethnoscience. Ethnoscience-based digital learning media can be used as interactive learning media because they provide precise visualizations of the concepts and conditions encountered during the learning process.

The aim of this research is to produce a minimum competency assessment instrument (MCA) on thermochemical material that meets the test criteria that is suitable for measuring students' reading literacy and numeracy in terms of validity, reliability, level of difficulty and distinguishing power. The research design used is a development and validation design. The participants involved in this research were high school students at one of the high schools in Bandung City as respondents and validators consisting of 3 lecturers and 2 teachers in their fields. The product resulting from this research is the MCA test instrument on thermochemical material which consists of 5 reading literacy questions and 15 numeracy questions. This test instrument was declared valid based on content validity and based on empirical validity, 16 questions were valid and 4 questions were invalid. The reliability test results showed that the reliability value for the objective questions was 0.73, while the reliability value for the description questions was 0.77 and both were declared reliable. The results of the MCA instrument competency level analysis show that students' reading literacy and numeracy competencies are included in the basic category and require special intervention with a refractive index of 1.53 and 1.00.

The world was very surprised by the existence of a new virus variant originating from China which we are usually familiar with as the Covid-19 Virus Variant. The Covid-19 virus is a threat to all corners of the world, this virus has forced the world to experience a global pandemic for the past few years. This type of research is a quantitative research type with data collection using a questionnaire. The methodology used in collecting research data this time was a survey of various teachers at high school of the same level in the cities of Banda Aceh and Aceh Besar. The purpose of using the survey method is to obtain accurate data on a group that is not limited to demographic information and is able to collect attitudes and beliefs in a population. This study used a data collection technique using random sampling consisting of 160 participants (23 men and 137 women) consisting of all teachers and school management in several high school schools in Banda Aceh and Aceh Besar. Online learning is also supported by students, teachers, school facilities and infrastructure that are ready to implement changes to the learning system imposed by the government. This is also supported by school facilities and infrastructure where schools already have good computers and have internet access that can be used in the online learning process