This research article aimed at exploring the effects of three different assessments (self-, peer-, and teacher-) on students’ text revision. Ten Indonesian tertiary-level EFL students participated in ...this study. It investigated the extent to which three types of assessment facilitate text revision, and analyzed students’ perception of these assessments. The research methods used were students’ text revision and semi-structure interview. The findings revealed two main points. First, the results showed that students made the total of 2,096 revision changes across 40 drafts, with lower percentage of self-feedback incorporated into their revision. Furthermore, the findings indicated that students had a tendency to engage in self-assessment practice more often when revising their drafts. Second, students mostly appreciated teacher-assessment, as opposed to under half of them favoured peer-assessment. In contrast, self-assessment showed a balanced response between positive and negative comments. The implications of this study were provide practical insight to EFL teachers into how three assessment types (teacher-, peer-, and self-) can be developed to help improve students’ writing performance, and to inform EFL teachers with some suggestions to explore students’ perceptions regarding the three assessments to help facilitate quality-enhancing text revisions.
Abstrak. Penelitian ini bertujuan untuk mengetahui bagaimana kelayakan dan respon uji coba terbatas penuntun praktikum kapasitor berbasis Keterampilan Proses Sains (KPS) sebagai perangkat ...pembelajaran fisika. Metode yang digunakan adalah penelitian dan pengembangan (R&D) dengan model 4-D. Penuntun praktikum ini sebagai perangkat pembelajaran fisika mampu memfasilitasi beberapa kegiatan praktikum yang mana setiap langkahnya berkaitan dengan KPS, diantaranya yaitu praktikum kapasitansi kapasitor keping sejajar, susunan kapasitor (seri-paralel-gabungan) dan pengisian pengosongan kapasitor. Hasil penelitian menunjukan bahwa penuntun praktikum layak digunakan, yaitu dengan nilai kelayakan 81,235% yang dikategorikan menjadi sangat layak serta mendapatkan respon peserta didik dengan kategori sangat baik sebesar 85,2%. Berdasarkan hasil yang didapat bahwa Penuntun Praktikum Kapasitor dapat memfasilitasi KPS siswa dan layak digunakan sebagai perangkat pembelajaran fisika.
Kata kunci: Keterampilan Proses Sains (KPS), perangkat pembelajaran, penuntun praktikum kapasitor
Abstract. This study aims to determine the feasibility and response of a limited trial of capacitor practicum guides based on Science Process Skills (SPS) as a physics learning tool. The method used is research and development (R&D) with the 4-D model. This practicum guide as a physics learning tool can facilitate several practicum activities in which each step is related to SPS, including the practicum capacitance of parallel pieces of capacitors, an arrangement of capacitors (series-parallel-combined), and charging-discharging of capacitors. The results showed that the practicum guide was feasible, namely with a feasibility value of 81.235%, which was categorized as very feasible and obtained student responses in the very good category of 85.2%. Based on the results obtained, the Capacitor Practicum Guide can facilitate students’ SPS and is suitable for use as a tool for learning physics.
Keywords: Science Process Skills (SPS), learning media, capacitor practicum guide,
The present study aims at examining EFL teachers’ perceptions of Language Assessment Literacy (hereafter LAL) in the context of Indonesian higher education. To this aim, purposive sampling technique ...was employed to select sixteen EFL university teachers to participate in an online questionnaire and semi-structured interviews. The finding showed that the participants had applied six types of LAL in their teaching practices with formative assessment methods and test validity and reliability being the two most applied (more than 80%) by the participants. Following this, between 75% and 80% participants had applied two other types of LAL, linguistics competence and test results. The last two types of LAL, digital literacy and grading criteria, were applied by less than 70% participants. Another finding from qualitative data revealed that the majority of participants (over 70%) ranked their level of LAL knowledge and skills as low. Despite some limitations, the present study provides some implications including the necessity for the EFL teachers to be equipped with relevant knowledge and skills to make the way for quality assessment. It is therefore university authorities should organize professional development programs with the purpose to help teachers improve their assessment literacy. In addition, all educational parties should collaborate to consistently conduct literacy assessment projects throughout teachers’ professional career. Some suggestions for future research in the field of language assessment are also presented.
Penelitian ini bertujuan untuk mengetahui kelayakan media pembelajaran Virtual Physics Lab (ViPhyLab) dalam Praktikum Hukum Kirchhoff. Metode penelitian yang digunakan adalah metode Research and ...Development (R&D) menurut Sugiyono, dengan subjek penelitian ini adalah 3 validator untuk mengetahui kelayakan media ViPhylab dan 16 siswa kelas XI MIPA SMA Al-Fath Cilegon yang digunakan untuk mengetahui tanggapan siswa terhadapa media ViPhyLab. Hasil penelitian menyatakan kelayakan media ViPhyLab hasil pengembangan yaitu sebesar 87,45% dengan kategori sangat layak dan tanggapan siswa terhadap media ViPhyLab menyatakan sebanyak 90,4% siswa menanggapi media ViPhyLab dengan kategori sangat baik.
Abstract
This study aims to develop a virtual website-based laboratory simulation on dynamic electricity topics. The method used in this study is Research and Development (R & D). The instrument of ...this research is questionnaire of expert team feasibility test and student response questionnaire using Likert scale. This study produced a website-based virtual physics laboratory on dynamic electricity topics for practicum-based learning in class XII high school students. The results showed that based on the assessment of material experts and media experts, the virtual laboratory simulation media had very reasonable criteria with an average of 95% and had very good criteria on the response of students with an average of 96.03%..
Keywords: development of virtual laboratory, website, dynamic electricity
Abstract
This study aims to determine the effect of learning using Learning Model-based on Worksheets to improve physics learning outcomes on material momentum and impulses. The research method used ...is quasi experiment with the Nonequivalent Control Group Design research design. The samples taken were 54 students consisting of 29 experimental classes and 25 control classes. The research instruments used were test instruments, worksheets based on tandur learning models and observation sheets. Before the test instrument is used, the instrument is tested for validity. The results showed that after using worksheets based on barren learning models there was an influence on student learning outcomes. Based on the results of the research data, the average value of the posttest of the experimental class students was 70. While the implementation of learning in the control class using procedural worksheets obtained the average posttest score of 31. In addition, the normal average gain of scores was obtained. the experimental class students were 0.6 and the control class was 0.2, thus experimental class is greater than the control class. The category of increasing student scores obtained from the calculation of normal gain in the experimental class included the medium category (0.6), while in the control class included in the low category (0.2). Thus, the use of worksheets based on instructional learning models in the learning process has an effect on improving student learning outcomes..
Keywords: Student worksheets, Learning Model Tandur, learning outcomes
This research article aimed to analyze the effects of Dynamic Assessment (DA) on EFL learners' reading comprehension. The participants in this case study were five Indonesian tertiary-level EFL ...learners. It investigated whether mediation in DA improve the learners reading comprehension performances and analyzed the extent to which mediation in DA benefit learning. The research methods used were pre-test, mediation, and post-test. The findings revealed two main points. First, the result of the post-test showed an overall improvement for all five students. As indicated by the effect size (0.96) and the result of paired samples t-test (p-value = 0.0028), it can be concluded that the effect of DA on the participants’ reading skill performance was highly significant. Second, mediation in DA appeared to benefit learning with different characteristics in each student. The implications of this study were to provide practical insight to EFL teachers into how mediation can be developed to improve learners' reading skills and to inform EFL teachers with some suggestions to carry out mediations to benefit learning.
This research article aimed to investigate the effect of interventions deployed by teachers in peer feedback in the context of Indonesian EFL writing classrooms. The participants in this case study ...were 16 Indonesian tertiary-level EFL learners. It explored types of teacher’s interventions on peer feedback, analyzed whether the learners use peer feedback to improve their writing, and explored how the learners appreciate peer feedback. The research methods used were questionnaire, teacher interventions, and interviews. The findings revealed three main points; (1) the teacher’s interventions were mostly on grammatical errors, inappropriate vocabularies, and content structures, (2) facilitated by the teacher’s interventions, more than 50% of the peer feedbacks were integrated by the students in their revision, (3) the students generally confirmed the usefulness of interventions deployed by the teacher on peer feedback. The implications of this study were to provide practical insight to EFL teachers into how peer feedback, supported by teacher interventions, can be develop to benefit learning, and to inform EFL teachers with some suggestions to carry out peer feedback to improve learners’ skill of writings.
The synthesis of magnetite (Fe3O4) nanoparticles with the addition of polyethylene glycol-4000 (PEG-4000) was successfully carried out using a two-step co-precipitation method for the possible ...biosensor applications. In this study, different concentrations of PEG on Fe3O4/PEG (1:0, 4:1, 3:1, 2:1 and 1:1) were used. The crystallite size of the Fe3O4 decreased (14.35 to 12.83 nm) with the increase of PEG concentrations. The presence of a new carbonyl group in the samples indicates the presence of PEG in the Fe3O4. The weight loss percentage of the Fe3O4 increased from 7.7 to 41.46% with the increase of PEG concentrations. With the addition of PEG, Fe3O4 have a well-defined and homogeneous shape due to the presence of PEG which acts as a dispersing and stabilizing agent characterized. The magnetic properties showed that all samples exhibited superparamagnetic behavior. The saturation magnetization values of Fe3O4 decreased with increasing PEG layer and reached values of 65.34 emu/g with zero remanent magnetization and coercivity field while maintaining the behavior superparamagnetism and high saturation magnetization. To evaluate the magnetic properties of the samples to the sensitivity of biosensor, GMR-biosensor was used. Five types of Fe3O4/PEG-alcohol solutions with a concentration of 50 μg/mL were dropped on the surface of the sensor. It was found that there was a decrease in the |ΔV| value with the increase of PEG concentrations, undergoing a linear function |ΔV| = 97.31x+1880.97. Thus, the remarkable fact of saturation magnetization and controllable particle size in these Fe3O4/PEG can serve as promising biosensor applications.
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•Magnetite (Fe3O4) nanoparticles with different reaction temperatures (TR= 40, 60 and 80 °C) were synthesized using the co-precipitation method.•Increasing TR would increase the value of Ms, however ...it can weaken the superparamagnetic behavior of the samples.•The ΔV obtained were 1.18 mV (TR = 40 °C), 1.56 mV (TR = 60 °C) and 1.88 mV (TR = 80 °C).•The |ΔV| linearly increases along with increasing reaction temperature, undergoes a linear function |ΔV|= 0.0175x + 0.49.•The feasibility of Fe3O4-based detection using a GMR sensor and Fe3O4 as magnetic labels will be useful for potential bio-detection applications.
Magnetite (Fe3O4) nanoparticles with different reaction temperatures (TR= 40, 60 and 80°C) for the application of bio-detection have been successfully synthesized using the co-precipitation method. The average crystallite sizes of samples increased with the increase of TR and all samples showed high crystallinity with an inverse spinel cubic structure. The grain size increased with the increase of TR. On the other hand, all samples have polycrystalline structure and the brightest intensity at Miller's index (311). From the results of the vibrating sample magnetometer (VSM) analysis, it was found that there was an increase in magnetic properties such as Hc, Mr and Ms along with the increase reaction temperature. For example, the saturation magnetization increased with the increase of TR. Next, the giant magnetoresistance (GMR) biosensor was explored by using an exchange-biased GMR sensor with the Wheatstone bridge method to detect Fe3O4 with variations of reaction temperature in an alcohol solution of 50 μg/ml. A DC in-plane magnetic field was used for this measurement. It was found that the Vout curve is sensitive to the presence of Fe3O4 and the maximum Vout appears at 2.8 Oe by applying an external field to the sensor of ± 95 Oe. The Vout difference increased with the increase of reaction temperature, which can be attributed to higher saturation magnetization, causing more difficult fringing of the magnetic field. The relationship between TR and |ΔV| is ΔV = 0.0175x + 0.49, in which |ΔV| linearly increases with the increase of reaction temperature. This study demonstrates the feasibility of Fe3O4-based detection using a GMR sensor and Fe3O4 as magnetic labels will be useful for potential bio-detection applications.
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