Class IVA Research Articles

Penerapan Model Problem Based Learning untuk Meningkatkan Hasil Belajar IPAS Siswa Kelas IV-A SDN Pakis 1 Surabaya

This study aims to improve the learning outcomes of students in class IV-A in IPAS subjects, especially on the material of friction and muscle force, by using the Problem Based Learning (PBL) Learning Model at SDN Pakis 1 Surabaya. This research is a Classroom Action Research (PTK) conducted in two cycles, each of which consists of planning, implementation, observation, and reflection stages. The subjects of this study were 28 students of class IV-A. The instruments used include learning outcome tests to measure students' understanding of the material taught. The results showed a significant increase in student learning outcomes. At the pre-cycle stage, only 39% of students achieved mastery, while 61% of students were not yet complete. After the implementation of PBL, in cycle 1 student completeness increased to 71%, and in cycle 2 all students reached completeness with a percentage of 100%. PBL proved to be effective in improving students' understanding of the concepts of friction and muscle force through problem solving that is relevant to everyday life. Thus, the application of Problem Based Learning (PBL) can significantly improve student learning outcomes in IPAS subjects, especially in understanding abstract concepts such as force. This method is also effective in developing students' critical and collaborative thinking skills.

Improving multiplication counting skills of class IV students using PBL model and Jarimatica technique

This research is quantitative in nature using a non-equivalent control group design. The sample consisted of class IVA as the controlling classes and the IVB as the experiment classes. The instrument used is an essay test that has been validated both validity and reliability. The analysis data was carried out with prerequisite test including tests for normality and homogeneity, as well as testing of hypotheses using the paired sample t-test, with help the IBM SPSS Statistics 25. The results show that a significance the value (2-tailed) of 0.000 less than the alpha value of 0.05. Since 0.000 less than 0.05, the alternative hypothesis (Ha) is accept and the null hypothesis (Ho) is reject. Therefore, conclusion is that the problem-based learning model and the finger math technique significantly improve the counting multiplication skills of SD Inpres 7 Labuan Baru fourth graders. Keywords: Problem Based Learning Model; Jarimatica Technique; Multiplication Counting Ability

TUBB4A Inhibits Glioma Development by Regulating ROS-PINK1/Parkin-Mitophagy Pathway.

Glioma is a refractory malignant tumor with a powerful capacity for invasiveness and a poor prognosis. This study aims to investigate the role and mechanism of tubulin beta class IVA (TUBB4A) in glioma progression. The differential expression of TUBB4A in humans was obtained from databases and analyzed. Glioma cells U251-MG and U87-MG were intervened by pcDNA3.1(+) and TUBB4A overexpression plasmid. MTT, CCK8, LDH, wound healing, transwell, and western blotting were used to explore whether TUBB4A participates in the development of glioma. Reactive oxygen species (ROS) were detected by the DCFH-DA probe. Mitochondrial membrane potential (MMP) was examined by JC-1. It was found thatTUBB4A expression level correlated with tumor grade, IDH1 status,1p/19q status, and poor survival in glioma patients. In addition, TUBB4A overexpression inhibited the proliferation, migration, and invasion of U251-MG and U87-MG, while increasing the degree of apoptosis. Notably, TUBB4A overexpression promotes ROS generation and MMP depolarization, and induces mitophagy through the PINK1/Parkin pathway. Interestingly, mitochondria-targeted ROS scavenger reversed the effect of TUBB4A overexpression on PINK1/Parkin expression and mitophagy, whereas mitophagy inhibitor did not affect ROS production. And the effect of TUBB4A overexpression on mitophagy and glioma progression was consistent with that of PINK1/Parkin agonist. In conclusion,TUBB4A is a molecular marker for predicting the prognosis of glioma patients and an effective target for inhibiting glioma progression by regulating ROS-PINK1/Parkin-mitophagy pathway.

The Influence of The Use of Audio-Visual Media on The Ability of Fraction Calculation Operations of Grade IV Students of SD Negeri 4 Amparita Sidrap

This study examines the effect of the use of audio-visual media on the ability of fraction calculation operations of fourth grade students of SD Negeri 4 Amparita. The main problem studied is whether there is a positive influence of audio-visual media on the ability of fraction calculation operations of fourth grade students of SD Negeri 4 Amparita. This study is an experimental research that aims to determine whether there is a positive effect of audiovisual media on the ability of fraction calculation operations of fourth grade students of SD Negeri 4 Amparita Sidrap on the material of addition and subtraction of fractions. This research uses a quantitative approach. This study consists of two variables, namely audiovisual media and conventional models as independent variables and students' fraction calculation operation skills as the dependent variable, using the Randomized Subject Pretest-Posttest Control Group Design research design. The population in this study were all 4th grade students of SD Negeri 4 Amparita consisting of 1 class with a total sample of 42 people. The research sample of class IVA as an experimental class with 21 students and Class IVB with 21 students who were selected by Random Class. The data obtained were analyzed with descriptive statistics and inferential statistics. The results of descriptive analysis showed that the average value of fraction calculation ability of experimental class students was 75.71 and the average value of fraction calculation ability of control class students was 60.48. The learning completeness of experimental class students was 85.95% while the learning completeness of control class students was 47.61%. Inferential statistical analysis to test the hypothesis through Independent Sample T-tests obtained the value of -t count < - t table (-3.678 < -2.021) or t count > t table (3.678 > 2.021) thus H0 is rejected and H1 is accepted. In this case, audio-visual media has a positive effect on the ability of fraction calculation operations of fourth grade students of SD Negeri 4 Amparita Sidrap.

Augmented Reality-Assisted Scrapbook Media Development in Natural and Social Science Learning

Natural and Social Sciences (known with IPAS) learning at the elementary school level still has many obstacles and shortcomings which impact student learning outcomes. This research is Research and Development referring to the Borg and Gall model with the aim of developing and testing the feasibility, practicality and effectivenessscrapbook media assisted by augmented reality. The population in this study was 35 people with 12 small-scale test subjects in class IVA students and 23 large-scale test subjects in class IVB at Public Alementary School (SDN) 1 Lambur. Data collection was carried out using test techniques (pretest-posttest) as well as non-tests in the form of observations, interview results, questionnaires and document data. The validation results by material, media and language expert validators show thatscrapbook media assisted by augmented realityhas met the valid criteria. Based on the pretest-posttest results, it is known thatscrapbook media assisted by augmented realityeffective in improving student learning outcomes with an increase in the average pretest and posttest scores and the results of the N-gain test obtained <g> a gain value of 0.67 in the medium category. Based on the results of the response questionnaire distributed, a very positive response was obtained from teachers and students. From these results it can be concluded thatscrapbook media assisted by augmented realityeffective for improving science and science learning outcomes and feasible and practical for use in class IV learning at SDN 1 Lambur.

The Influence of the CIRC Learning Model (Cooperative, Integrated, Reading, and Composition) on the Reading Skills Students at Islamic Elementary School

This research describes the influence of the CIRC (Cooperative, Integrated, Reading, and Composition) learning model on reading comprehension skills. This research was carried out at MIN 4 Medan City, which was carried out in the even semester of 2023/2024. This research uses a quantitative approach with a Quasi-Experimental type. This study's population was all class IV MIN 4 Medan City students, totaling 120 students, using proactive random sampling. The research sample consisted of 41 students from classes IV-A and IV-B. The data collection techniques are observation, interviews, documentation, and tests. The data analysis techniques used are descriptive analysis and inferential analysis, namely through normality, homogeneity, and independent t-tests, to test hypotheses with the help of the SPSS 27.0 application. The research results showed a difference in the average score obtained in the control class from 51.05 to 64.47 and in the experimental class from 45.00 to 84.09. This shows that using the CIRC (Cooperative, Integrated, Reading, and Composition) learning model influences students' reading comprehension skills. This is proven by the results of the T-test calculation, which shows a Sig (2-tailed) value of 0.000<0.05 so that H_o is rejected and H_a is accepted, meaning that there is a significant influence between the control and experimental classes.

Pengaruh Model Pembelajaran Take and Give Terhadap Keterampilan Berdiskusi Siswa Pada pembelajaran IPAS Bab 8 Kelas IV SDN 060898 Medan T.A 2023/2024

This research aims to determine the effect of the Take and Give learning model on students' discussion skills in learning Science Chapter 8 class IV at SD Negeri 060898 Medan. The type of research used in this research is quantitative research with a Quasi Experimental approach. The subjects in this research were all fourth grade students at SD Negeri 060898 Medan. The sampling technique used was random sampling of 22 class IVA students and 22 class IVB students at SD Negeri 060898 Medan. Data analysis was carried out using quantitative analysis. From the research results, it can be concluded that there is an influence of the Take and Give learning model on students' discussion skills in learning science and science chapter 8 class IV at SD Negeri 060898 Medan. This can be seen from the posttest average of experimental class students' discussion skills which is higher than the control class, namely 37.9 > 29.7, and seen from the hypothesis test carried out by researchers based on the results of comparing t_count with t_table, namely 16.164 > 1.682 with a significant level. 5% which causes Ha to be accepted and Ho to be rejected.

Modern vs Traditional: Comparative Study of Efficacious Arabic Language Learning Methods

Ineffective use of learning methods in the conditions and circumstances of students caused the obtained learning objective not achieved or below the standard. This case was determined to be the background for this research. This article described and analyzed the comparative of efficacious methods, modern and traditional learning methods, in Arabic learning. This type of research was an experimental research with a descriptive quantitative approach. The population of this study were fourth-grade students in class IV-A, IV-B and IV-C at MI Al-Ma'had An-Nur Bantul Yogyakarta. Meanwhile, the sample for this research was class IV-A and IV-B with each class consisting of 21 students. The sample in this research was selected with purposive sampling technique. Data collection were obtained through tests, observations, interviews and documentation. Hypothesis testing in this study used a paired sample t-test calculated using the SPSS version 25 application. The results of this study showed that there was a difference in success between modern learning methods of 84.05 and traditional learning methods of 64.05 in accordance with the results of the paired sample test (t-test). Hence, it can be concluded that the results after modern learning methods implementation are considered more effective to apply in the Arabic language learning process. It was expected that the results of this research could be a reference for teachers in determining suitable learning methods for students in the teaching and learning process.

Penerapan Pendekatan Realistic Mathematics Education (RME) Berbantuan Media Powerpoint terhadap Hasil Belajar Matematika Ditinjau dari Gaya Belajar Siswa Kelas IVA SD Negeri 2 Wameo

This research aims to increase the activities of teachers, students and learning outcomes in mathematics subjects through the application of the Realistic Mathematics Education (RME) approach assisted by PowerPoint media in terms of learning styles. This research is Classroom Action Research (PTK). The subjects of this research were teachers and students of class IVa SDN 2 Wameo, the number of students was 30 people. The types of data in this research are qualitative data and quantitative data. This research shows the following results: (1) the application of the Realistic Mathematics Education (RME) approach can increase teacher activity by 92.71% (good category), far above the predetermined success indicator, namely ≥75% (good category) . (2) The application of the Realistic Mathematics Education (RME) approach can increase student learning activities, namely 76.27% (good category), which is above the success indicator, namely ≥75% (good category). (3) Applying the Realistic Mathematics Education (RME) approach can improve mathematics learning outcomes, namely 96.67% (complete category), far above the success indicator, namely ≥85% (complete category).

Upaya Meningkatkan Kemampuan Membaca Siswa Dengan Metode TGT (Teames Games Tournament) Pada Siswa Kelas IVA SDN 01 Mamben Daya Semester 1 Tahun Pelajaran 2021/2022

This study aims to improve students' reading skills through the TGT (Teams Games Tournament) method. This type of research is CAR (Classroom Action Research) which is carried out in two cycles with each cycle being carried out in two meetings. Each meeting consists of four stages, namely planning, implementation, observation and reflection which is carried out for two hours of lessons. The subjects of this study were students of class IVA SDN 01 Mamben Daya. Data collection techniques using observation, documentation and oral tests. The data analysis technique used is descriptive qualitative and descriptive quantitative. The results in the initial condition of students' ability to read words through the TGT (Teams Games Tournament) method only reached 11 students with a percentage of 50% belonging to the "completed" category while 11 students with a percentage of 50% belonging to the "incomplete" category. In the first cycle the increase in students' abilities increased by 13 students with a percentage of 63% belonging to the "completed" category while 9 students with a percentage of 37% belonging to the "incomplete" category. While in the second cycle there were 20 students with a percentage of 80% belonging to the "completed" category while 2 students with a percentage of 20% belonging to the "incomplete" category. So that research using the TGT (Teams Games Tournament) method is said to be successful in improving students' reading skills

Penerapan Model Pembelajaran Berbasis Proyek Pada Mata Pelajaran Seni Budaya Untuk Meningkatkan Minat Dan Kreativitas Siswa Kelas IVA UPT SPF SD Inpres Tamamaung IV Kota Makassar

The main problem in this research is in learning activities where based on observations that have been made it was found that problems exist in class IVA, namely that there are still some students who have a lack of interest in learning and their level of creativity is also lacking because the teacher still uses conventional methods. So the author decided to conduct research in this class to make improvements using a project-based learning model. This research aims to determine the application of the project-based learning model to increase the interest and creativity of class IVA UPT SPF SD Inpres Tamamaung IV students, Makassar City. This type of research is Classroom Action Research (PTK) which includes four stages, namely planning, implementation, observation and reflection. The subjects of this research were 22 students in class IVA UPT SPF SD Inpres Tamamaung IV, Makassar City. This research instrument uses teacher activity observation sheets, student interest observation sheets and student creativity observation sheets. Then this data is analyzed using the average formula. From the results of this research, the average results of observation of teacher activities in cycle I were 56% (Poor) with an increase in cycle II of 90% (Very Good). The results of observing student interest in the first cycle were 69% (fairly good) and increased in the second cycle by 89% (very good). Meanwhile, student creativity also increased, in cycle I with a percentage of 74.43% (Medium Creativity) and experienced an increase in cycle II with a percentage of 80.10% (High creativity). Thus, the project-based learning model can increase student interest and creativity in Arts and Culture subjects. with material on Simple Comics and Making Curtains from Used Materials in class IVA UPT SPF SD Inpres Tamamaung IV Makassar City.

Transcription factor 4 promotes increased corneal endothelial cellular migration by altering microtubules in Fuchs endothelial corneal dystrophy

Fuchs endothelial corneal dystrophy (FECD) is a complex corneal disease characterized by the progressive decline and morphological changes of corneal endothelial cells (CECs) that leads to corneal edema and vision loss. The most common mutation in FECD is an intronic CTG repeat expansion in transcription factor 4 (TCF4) that leads to its altered expression. Corneal endothelial wound healing occurs primarily through cell enlargement and migration, and FECD CECs have been shown to display increased migration speeds. In this study, we aim to determine whether TCF4 can promote cellular migration in FECD CECs. We generated stable CEC lines derived from FECD patients that overexpressed different TCF4 isoforms and investigated epithelial-to-mesenchymal (EMT) expression, morphological analysis and cellular migration speeds. We found that full length TCF4-B isoform overexpression promotes cellular migration in FECD CECs in an EMT-independent manner. RNA-sequencing identified several pathways including the negative regulation of microtubules, with TUBB4A (tubulin beta 4A class IVa) as the top upregulated gene. TUBB4A expression was increased in FECD ex vivo specimens, and there was altered expression of cytoskeleton proteins, tubulin and actin, compared to normal healthy donor ex vivo specimens. Additionally, there was increased acetylation and detyrosination of microtubules in FECD supporting that microtubule stability is altered in FECD and could promote cellular migration. Future studies could be aimed at investigating if targeting the cytoskeleton and microtubules would have therapeutic potential for FECD by promoting cellular migration and regeneration.

PEMBINAAN KARAKTER SEMANGAT KEBANGSAAN MELALUI PEMBIASAAN UPACARA BENDERA HARI SENIN DI SD NEGERI SERANG 20

The current conditions show a decrease in character, including the character of national spirit. The efforts are needed to develop this character. The aim of this research is to find out how the ceremony is carried out at SD Negeri Serang 20 and the implications of holding the flag ceremony on Monday for developing the character of the national spirit of students at SD Negeri Serang 20. This research applied qualitative research with a case study method. The subjects of this research were the principal, class teacher VIB, and 100 students from classes IVA, IVB, VA, VB, VIA, and VIB located at SD Negeri Serang 20. Methods of observation, interviews, and distributing questionnaires were used to obtain the required data of this investigation. Then the data was analyzed using the Miles and Huberman model data analysis technique. Monday's flag ceremony starts at 07.00-07.40 WIB which includes preparation, implementation of the main event, and conditioning for each classes. Based on the results of observations and interviews, it can be proven that Monday flag ceremony can foster the character of the national spirit in SD Negeri Serang 20. Then this implication is strengthened by the results of the questionnaire which shows that 91% of students answered correctly and 9% of students answered incorrectly. It can be concluded that Monday's flag ceremony shows significant implications for the development of national spirit character.

PENGARUH MODEL DISCOVERY LEARNING TERHADAP PERKEMBANGAN KOGNITIF SISWA KELAS IV SEKOLAH DASAR

The aim of the research is to determine the effect of using the discovery learning model of the students’ cognitive development on science subjects at grade IV in elementary schools. The research applied a quantitative approach with an experimental design. The research involved fourth grade students at SD Negeri 06 Karangasem. This research involved two classes, namely the experimental class and the control class. Tests is used as instruments in this research, namely pretest and posttest. Where the pretest is used on students before being given treatment to the two classes. While the posttest is used after the treatment is carried out. Preparation of tests based on criteria C1-C6. The research samples were classes IVA and IVB. The t test calculations obtained tcount= 6.515 and ttable= 2.000 and this means tcount>ttable. There is a significant influence on the use of the discovery learning model on the class IV students’ cognitive development on science subjects with material force on objects in SD Negeri 06 Karangasem.

Fenomena Pengelolaan Kelas Pada Pembelajaran Di Sekolah Dasar

This research aims to describe the phenomenon of classroom management skills in learning at SD Negeri 11 Kota Bengkulu. This study is a descriptive qualitative research. The subjects of this research are teachers from class IIA and IVA. The results of this research indicate that teachers are quite effective in implementing preventive classroom management skills, such as being attentive to students, providing clear instructions, observing closely, approaching students, making statements, reacting to disruptive behavior, giving admonishments, providing reinforcement, and demanding responsibility. On the other hand, the skills that are considered punitive include giving punishments and addressing problematic student behaviors. However, there are still areas that need improvement in certain activities. For example, in terms of being attentive to students and approaching them, teachers have weaknesses in simultaneously observing the overall activities of the students. Furthermore, in activities that demand responsibility from students, teachers pay little attention to the culture of queuing in cultivating students' sense of responsibility.

PERAN GURU DALAM PELAKSANAAN PEMBELAJARAN IPAS MELALUI IMPLEMENTASI KURIKULUM MERDEKA DI SD NEGERI 01 NAMROLE

The curriculum functions to regulate and serve as a guide for teachers, as well as efforts to realize educational goals. The emergence of a new curriculum, namely the independent learning curriculum. One implementation is that science and social studies subjects are combined into one under the name IPAS. This is based on the fact that elementary school age children see everything in an integrated manner, even though not in detail. This research uses a qualitative approach with descriptive research type. The research subjects were school principals, science and science teachers for classes IA, IB and IVA, IVB. Data collection was carried out by observation, interviews and documentation. The data analysis techniques are carried out by data reduction, data presentation, and drawing conclusions. The results of the research show that: First, at SD Negeri 01 Namrole, the Independent Curriculum has been implemented by implementing project-based learning, diagnostic, formative and summative assessments, subject-based learning, science, report cards, ATP and Teaching Modules carried out in groups. Second, the role of teachers in implementing the Independent Curriculum. There are 13 teacher roles, namely corrector, inspirer, informator, organizer, motivator, initiator, facilitator, guide, demonstrator, class manager, mediator, supervisor and evaluator. in planning, implementing and assessing learning are difficulties in analyzing CP, formulating TP and compiling ATP and Teaching Modules, determining learning methods and strategies, lack of ability to use technology, limited student books, lack of ability and readiness to use learning methods and media, teaching materials are too broad , determining class I and IV projects, lack of time allocation for project-based learning, determining the form of assessment and form of assessment in project-based learning. Third, the efforts applied by teachers in overcoming problems in implementing the Independent Learning Curriculum are regular meetings with KKG, PMO assistance and specifically coaching school principals, using alphabet books, writing on the board, typing, making worksheets, and creating formats for their own projects, continuing the project. at home, make notes, and take part in training to implement the Merdeka Curriculum.

Pengaruh Penggunaan Media Botol Cerdas terhadap Hasil Belajar Bahasa Indonesia Siswa di MIN 10 Medan

This study aims to determine the effect of using smart bottle media to improve the learning outcomes of Indonesian students in grade IV at MIN 10 Medan, which consist of two classes. The researcher took class IV-A and IV-B to be used as a sample, totaling 12 people as the experimental class and 12 people as the control class. This type of research is a quantitative experimental research (Quasi Experimental Design) with the Nonequevalent Control Group Design approach. Data collection techniques with observation, documentation, and test. Based on data analysis from research result werw obtained: 1) The Indonesian language learning result of students at MIN 10 Medan using picture story can be seen from the average final test (posttest) score in the control class, namely class IV-A, which obtained an average score of 48,33 and a standar deviation of 15,27. 3) The Indonesian language learning results of students at MIN 10 Medan using a smart bottle media can be seen from the average final test (posttest) score in the experimental class, namely class IV-B, which obtained an average score of 53,33 and a standard deviation of 16,69. 3) The process of implementing smart bottle media in Indonesian language subjects in class IV MIN 10 Medan is going well and can improve student learning outcome in Indonesian language subjects. This can be seen from comparison of learning outcomes between the experimental class and the control class, where the learning outcomes of students in the experimental class are higher than the learning outcomes of students in the control class.

Meningkatkan Hasil Belajar Siswa Pada Mata Pelajaran Matematika Materi Bilangan Desimal Metode Demonstrasi Siswa Kelas IVA UPT SD Negeri 028 Kubang Jaya

The aim of this research is to describe and analyze students' relatively permanent attitudes or behavior from experience or training with Decimal Number material through the application of the demonstration method. This research method uses qualitative research with the type of Classroom Action Research. Primary data source for students and teachers in class IV A. Data collection techniques used observation, interviews and documentation. Data analysis techniques use data reduction, data triangulation, and data collection. The repairs were carried out in class IVA UPT SD Negeri 028 Kubang Jaya, Siak Hulu District, Kampar Regency with a total of 39 students consisting of 20 male students and 19 female students. The results of data findings using the analysis and problem formulation above show that the learning improvement program is carried out by teachers to improve student learning outcomes in Mathematics subject matter. The application of the demonstration method and the use of decimal number image media can improve student learning outcomes for Decimal Numbers in Mathematics subjects. Results achieved by students after applying the demonstration method. Changes in student learning outcomes after using the demonstration method.

THE INFLUENCE OF THE FIELD TRIP METHOD ON DESCRIPTIVE TEXT WRITING SKILLS IN CLASS IV STUDENTS AT SD NEGERI 11 WARKUK SOUTH RANAU

The aim of this research is to determine the effect of the field trip method on descriptive text writing skills in class IV students at SD Negeri 11 Warkuk South Ranau. The method used is experimental research with the type of research carried out in this research being Pre Experimental Design with the form of research design using One Group Pretest-Posttest Design. The population in this study was all 37 class IV students. Meanwhile, the sample used in this research was 24 class IVA students. Based on the calculation results, the T-count value was 10.360 > T-table 1.71 in the T-test sample. with sig value. (2-tailed) = 0.000 < 0.05, according to the basis for decision making in the paired sample T-test, it can be concluded that Ha is accepted and Ho is rejected, which means that the use of the field trip method has an influence on the results of writing descriptive texts for class IV at SD Negeri 11 Warkuk South Ranau.

Implementation of Technological Pedagogical Content Knowledge in Efforts to Improve Mathematical Abilities

The purpose of this research is to determine: the implementation of Technological Pedagogical Content Knowledge (TPACK) learning design in efforts to improve students’ mathematical abilities. The research method used is Classroom Action Research (CAR) with the Jhon Eliot model conducted in three cycles. The research sample consisted of 22 students in class IVA. The results obtained from the research are as follows: The mathematical abilities results in cycles I, II, and III show that the percentage of students who obtained grades A and A-is 18.18%, 54.55%, and 77.27%. Therefore, based on the research results, it can be concluded that the implementation of TPACK learning design can improve students’ mathematical abilities