Experimenting on Natural Acid-Base Indicators: A Home-based Chemistry Activity during the COVID-19 Pandemic as evaluated by Teachers

Sanchez, Joje Mar P.; Fernández, M.J. Méndez; Abgao, Jules Mark; Sarona, Hezel; Asenjo, Stephen Bryan; Guiroy, Blezy; Oponda, Abegail Joyce; Vale, Xerxen

doi:10.26534/kimika.v32i1.34-45

Cited by 9 publications

(18 citation statements)

References 16 publications

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“…In turn, the study of Dioneda (2019) has the largest effect size, at g=3.94, which means that a student exposed to localized and contextualized teaching improved their biology performance to a greater extent than the control group. These quantitative studies are supported by the other Philippine studies on using contextualization in science (Belen & Caballes, 2020;Sanchez et al, 2021;Tabotabo-Picardal & Picardal, 2017;Tadena & Hairulla, 2021), which indicates that the instructional approach investigated by the meta-analysis has a positive effect on science learning.…”

Section: Effect Sizes Of Contextualized Instruction In Sciencesupporting

confidence: 69%

“…Finally, the aim of this current investigation is reporting on the curriculum, enacted vis-à-vis contextualized instruction, and described by empirical studies conducted by teachers and researchers in the Philippines. The extent of effectiveness of contextualization is gauged through analysis of studies undertaken in various scientific disciplines, such as biology (Belen & Caballes, 2020;Tabotabo-Picardal & Paño, 2017), chemistry (Sanchez, 2017(Sanchez, , 2021, physics (Rivera & Sanchez, 2020), environmental science (Tadena & Salic-Hairulla, 2021), and home-based experimentation (Sanchez et al, 2021). The popularity of the contextualization approach as an instructional intervention warrants further investigation into the extent of its effectiveness in helping students achieve learning outcomes, as do the various strategies employed in contextualization instruction.…”

Section: Contextualization In the Context Of The Studymentioning

confidence: 99%

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Effectiveness of Contextualization in Science Instruction to Enhance Science Literacy in the Philippines: A Meta-Analysis

Picardal

Sanchez

2022

IJLTER

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A call for students to have a deeper understanding, so that they can make sense of and apply their learning to authentic situations, has reverberated in science teaching in the Philippines. In response, educators, teachers, and policymakers have embraced contextualization as a constructivist approach to bridging the gap between concepts and real-life experiences. Considering the popularity of this approach, it is imperative to examine the overall effectiveness of contextualization in improving students' achievement at all educational levels and in all science domains, compared to the traditional setup. By using a set of inclusion selection criteria, 10 Philippine-based studies conducted from 2017 to 2020 qualified to be included in a meta-analysis. Seven of the studies focused on the secondary level and three on tertiary level. Studies were extracted from several meta-search engines, namely Google Scholar, Science Direct, ERIC, and JSTOR; the search was facilitated by Harzing's Publish and Perish software. Statistical results from these studies were analyzed using Meta-Essentials, version 1.4, to calculate the effect sizes, to conduct subgroup and moderator analyses, and to determine publication bias. Contextualization is an approach to teaching science that could have a positive effect on students' achievement. The variables educational level and science domain were found to have no influence on student achievement. Contextualized instruction used various techniques to maximize achievement of learning outcomes. A further systematic review, covering a wider scope, must be conducted to examine indicators that may influence the implementation of contextualization in the teaching and learning process.

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Section: Effect Sizes Of Contextualized Instruction In Sciencesupporting

confidence: 69%

Section: Contextualization In the Context Of The Studymentioning

confidence: 99%

Effectiveness of Contextualization in Science Instruction to Enhance Science Literacy in the Philippines: A Meta-Analysis

Picardal

Sanchez

2022

IJLTER

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“…Several difficulties emerged during the implementation such as the lack of practical activities and the poor quality of instructional materials. Sanchez et al (2021) performed a study to determine the feasibility of conducting a laboratory experiment on natural acid-base indicators as a home-based activity. They found that although at-home activities are feasible and satisfying, there were errors and discrepancies in the outcomes of the experiments.…”

Section: Theoretical Framework Of the Studymentioning

confidence: 99%

Students Knowledge gains, Self-efficacy, Perceived Level of Engagement, and Perceptionswith regard toHome-based Biology Experiments(HBEs)

Robledo¹,

Miguel²,

Arizala-Pillar³

et al. 2023

tused

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Home-based biology experiments (HBEs) are practical learning activities that allow students to perform safe and relevant experiments at home. Motivated by the need to innovate teaching approaches in science education due to the COVID-19 pandemic, this study was conducted to determine the effects of home-based biology experiments (HBEs) on their knowledge gains, self-efficacy, and perceived level of engagement. In addition, students' teachers' and parents' feedback were also investigated. This study employed a quasi-experimental research design using a mixed-method approach involving a pretest/post-test design in which ten teacher-collaborators and 836 pupils participated. Fifteen-item teacher-made parallel tests and the 38-item perceptions, self-efficacy and engagement questionnaire were distributed via Google Forms. Results revealed that most participants strongly agreed that HBEs were lesson congruent and risk-free, the materials were readily available, and it was fun and challenging (M=3.56, SD=0.77). Moreover, HBEs were found to be effective in improving pupils' knowledge gains (T=119, z=-4.56, p=0.04), self-efficacy (M=3.36, SD=0.71), and perceived level of engagement (M=3.45, SD=0.69). Responses were significantly different when grouped according to grade level, gender, and type of HBEs used. The results of thematic analysis were categorised as "Affordances" and "Constraints". Six subthemes emerged from the Affordances : "Safety", "Feasibility", "Independent Learning", "Learning Material", and "Affordability", while there were four subthemes for "Constraints": "Expenses", "Student Interaction", "Availability", and "Time Management". It can be concluded that home-based biology experiments are effective and relevant teaching strategies to deliver practical learning in the distance learning modality.

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“…Indikator yang digunakan dalam titrasi menunjukkan perubahan warna yang ditandai dengan baik dalam interval pH tertentu, Sebagian besar indikator ini adalah pewarna organik dan berasal dari sintetik tetapi karena menimbulkan pencemaran lingkungan, aspek ketersediaan dan biaya, maka pencarian senyawa alami sebagai indikator asam basa dimulai [2]. Beberapa peneliti sudah memanfaatkan potensi pewarna alami untuk indikator asam basa [3][4][5][6][7][8][9][10][11][12][13].…”

Section: Pendahuluanunclassified

“…Media pembelajaran yang dapat merangsang cara berpikir siswa salah satunya adalah dengan memanfaatkan sumber daya alam sekitar. Penerapan teknologi pembelajaran, yaitu dengan memberdayakan sumber-sumber belajar yang dirancang dan dimanfaatkan serta dikelola untuk tujuan pembelajaraan seperti memanfaatkan sumber daya alam sekitar, dapat meningkatkan pemahaman siswa [5,10].…”

Section: Analisis Situasiunclassified

Indikator pH Dari Kulit Buah Naga Merah (Hylocereus Polyrhizus) Untuk Praktikum Kimia Di SMAN 1 Wonosari Klaten

2023

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Saat ini indikator sintetik adalah pilihan titrasi asam-basa, tetapi karena alasan polusi lingkungan, ketersediaan, dan biaya, pencarian senyawa alami sebagai indikator asam basa telah dimulai. Indikator membantu menentukan titik ekivalen dalam titrasi asam basa (titrasi netralisasi). Indikator menunjukkan perubahan warna yang signifikan akibat perubahan pH. Pigmen berwarna yang diperoleh dari berbagai jenis tumbuhan telah ditemukan menunjukkan perubahan warna dengan variasi pH. Saat ini berbagai ekstrak tumbuhan digunakan sebagai indikator asam basa, salah satunya adalah kulit buah naga merah (Hylocereus polyrhizus) yang belum dimanfaatkan secara optimal. Kegiatan pengabdian ini dilakukan di SMA Negeri 1 Wonosari, Klaten, dengan mengambil topik indikator titrasi asam basa untuk memberikan alternatif penggunaan ekstrak kulit buah naga dalam pembelajaran praktikum kimia. Umumnya penggunaan indikator asam basa antara lain adalah kertas lakmus dan indikator berbentuk larutan seperti metil orange dan phenolftalein. Penggunaan indikator alami dapat menjadi alternatif pendukung dalam pemilihan indikator yang ramah lingkungan. Ekstrak kulit buah naga ini selanjutnya dibuat menjadi bentuk kertas pH sehingga dapat digunakan sebagai indikator asam basa.

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Experimenting on Natural Acid-Base Indicators: A Home-based Chemistry Activity during the COVID-19 Pandemic as evaluated by Teachers

Cited by 9 publications

References 16 publications

Effectiveness of Contextualization in Science Instruction to Enhance Science Literacy in the Philippines: A Meta-Analysis

Effectiveness of Contextualization in Science Instruction to Enhance Science Literacy in the Philippines: A Meta-Analysis

Students Knowledge gains, Self-efficacy, Perceived Level of Engagement, and Perceptionswith regard toHome-based Biology Experiments(HBEs)

Indikator pH Dari Kulit Buah Naga Merah (Hylocereus Polyrhizus) Untuk Praktikum Kimia Di SMAN 1 Wonosari Klaten

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