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1.

Child Science Skill Improvement through Hands-On Learning Activities in Kindergarten with Limited Human Resources and Facilities Rukiyah, Marlina, Mohammad Kanedi American Journal of Educational Research. 2017 5 (5). doi: 10.12691/education-5-5-10 Keywords: early childhood education, kindergarten curriculum, science process skill, science product skill, science skill, process skill approach Context: The early childhood education (ECE) curriculum in Indonesia, either explicitly or implicitly, includes science skills as one of the basic competencies that children must achieve. However, under the pretext of lack availability of facilities, majority of educators have not carry out science learning appropriately. This study aimed to demonstrate and convince early childhood education practitioners that an interesting and effective learning to develop science process skills of children can be implemented even in a kindergarten with limited facilities. By using one-shot case study design, 17children of Group B (aged 5-6 years) at Srijaya Kindergarten of Palembang were exposed to hands-on activities including exploring materials that float or sink, dissolved or unsoluble, color mixing; making letters using play dough; and observing insects with magnifying glass. The child science skills were observed and assessed using observational forms and child worksheets. The results showed 9 (52.95%) subjects obtained scores range 80-100; 4 (23.5%) achieved score range of 66-79, 3 (17.6%) reached score range of 56-65, and 1 (5.9%) obtained score of 52. Thus, it can be concluded that science learning with a process skill approach proved to be effective for developing children's science skills, even in kindergartens with limited facilities such as in Srijaya Kindergarten of Palembang. Abstract Full Text (PDF) [Epub] Full Text (HTML)

2.

Face-To-Face Laboratory Experiments Versus E-Laboratory Experiments on Developing Students’ Basic Science Process Skills and Interest Towards Learning Physics Rocky C. Valmores, Laila S. Lomibao Journal of Innovations in Teaching and Learning. 2026 6 (1). doi: 10.12691/jitl-6-1-6 Keywords: basic science process skills, physics interest, face-to-face laboratory, e-laboratory, quasi-experimental design Context: ...ard learning physics. Hence, it is recommended that schools should establish well-equipped laboratories to provide students with Hands-On Learning experiences that develop their basic science process skills and interest towards learning physics.... Abstract Full Text (PDF) [Epub] Full Text (HTML)

3.

Effectiveness Assessment of Social Behavioral Change Activities in Infant and Young Child Feeding (IYCF) of the Nutrition Program in the Rohingya Refugee Camps Dr. Taslima Arzu, Md. Ariful Kabir Sujan, S.M. Symon Bappy, Vulon Prosad, Suparna Das Toma International Journal of Clinical Nutrition. 2025 9 (1). doi: 10.12691/ijcn-9-1-1 Keywords: Behavioral Change, Breastfeeding, Malnutrition, Rohingya Refugee, Infant and Young Child Feeding Context: ...ounseling from IYCF corner at nutrition facilities as well as health facilities. Complementary feeding cooking demonstration for Hands-On Learning can change the negative behavior of the targeted audience in a positive direction. In this study, we found that 94.3% of mo... Abstract Full Text (PDF) [Epub] Full Text (HTML)

4.

Modelling the Interplay of K-12 Science Teachers’ Pedagogical Practices Wilfredo B. Baniqued, Peter Paul S. Cagatao, Romiro G. Bautista American Journal of Educational Research. 2024 12 (11). doi: 10.12691/education-12-11-2 Keywords: Student-Centered Pedagogy, Hands-On Learning , Scaffolding, Assessment and Feedback, Professional Development, K-12 Science Education, PLS-SEM, Constructivist Learning Theory Context: This study investigates the interplay of various pedagogical strategies—Student-Centered Pedagogy, Hands-On Learning , Scaffolding, Assessment and Feedback, and Professional Development—and their impact on student outcomes in K-12 science ed... Abstract Full Text (PDF) [Epub] Full Text (HTML)

5.

Carboxymethylcellulose-supported Palladium Nanoparticles Formed in situ for Suzuki-Miyaura Coupling Reaction Xiaojian Liao, Yuemin Zhou, Fu Tang, Xia Lin, Yiqun Li World Journal of Organic Chemistry. 2021 9 (1). doi: 10.12691/wjoc-9-1-3 Keywords: organic experiment, green chemistry, Suzuki-Miyaura reaction, supported catalyst, palladium nanoparticles, carboxymethylcellulose, upper-division undergraduate, Hands-On Learning /manipulatives Context: A green experiment is described here for direct fabrication of carboxymethylcellulose-supported palladium nanoparticles (PdNPs@CMC) in situ through a simple self-assemble and self-reduction process between carboxymethylcellulose (CMC-Na) and PdCl2 solution. The PdNPs@CMC was well characterized by ICP, UV-Vis, XPS, FTIR, SEM, and TEM techniques. The in situ synthesized PdNPs@CMC was proved to be an efficient catalyst for Suzuki-Miyaura coupling reaction under mild aerobic conditions. The superior catalytic performance of PdNPs@CMC is attributed to the coordination with carboxyl groups (−COO−) and free hydroxyl groups (−OH) as well as polymeric capping effect of CMC. Moreover, the catalyst showed no significant loss of its activity at least three consecutive cycles. This laboratory class is involved in the preparation and characterization of PdNPs@CMC as well as its catalytic application in Suzuki−Miyaura cross coupling reaction under green conditions. This laboratory class is suggested to divide into two parts. The first part includes the fabrication of catalyst in situ through a self-assemble and self-reduction of Pd(II) with CMC−Na, and characterization of the as-prepared catalyst using various techniques. The second part employs the resulting catalyst to perform a microscale Suzuki-Miyaura reaction, recycling of catalyst, and characterization of the product. By design, this comprehensive experiment set up for the third-year undergraduate, and aim to make students comprehend the concept of ion-exchange reaction, reduction reaction, carbon-carbon coupling reaction, supported catalysts, nanoparticles, and green chemistry as well as train the fundamental operation capability of students, and improve their experimental skills. Abstract Full Text (PDF) [Epub] Full Text (HTML)

6.

Qualitative and Quantitative Analyses of Synthesized Short-Chain Fatty Acid Phenyl Esters Using Fourier-Transform Infrared Spectroscopy Ronald P. D’Amelia, Masashi W. Kimura, Marie-Claire Villon World Journal of Organic Chemistry. 2021 9 (1). doi: 10.12691/wjoc-9-1-2 Keywords: ab initio, computational chemistry, density functional theory, esterification, Fourier-transform infrared spectroscopy, Hands-On Learning , phenyl esters, phenyl ester mixtures, quantitative analysis, synthetic organic chemistry, undergraduate laboratory experimente Context: Fourier-transform infrared spectroscopy (FT-IR) is a widely used technique to qualitatively determine the molecular structure of organic compounds; however, using quantitative FT-IR (qFT-IR) for the compositional analyses of mixtures is less common. To reinforce instrumental use in undergraduate laboratories, we have devised a multipart experiment that not only combines the qualitative and quantitative aspects of FT-IR but also exposes students to computational and synthetic organic chemistry. The objectives of this experiment are to synthesize a series of phenyl esters (PhEs) of various molecular weights; use qualitative FT-IR to characterize and compare the synthesized products with standards, databases, and with theoretical spectra computed using the cost-efficient B97-3c functional; and determine the weight percent (wt. %) composition of a binary mixture. We report on the methodologies used to synthesize and purify four PhEs; characterize them using FT-IR, conduct theoretical calculations and compare their FT-IR spectra with experimental ones; and determine the wt. % composition of phenyl acetate (PhAc), phenyl propionate (PhPr), phenyl butyrate (PhBu), and phenyl hexanoate (PhHex) in binary mixtures ranging from 0% to 100%. The results show a strong, linear correlation of gravimetrically calculated wt. % composition of a selected compound in a binary mixture using qFT-IR. This experiment demonstrates the applicability of qFT-IR as an educational tool for the undergraduate chemical laboratory and combines four different branches of chemistry: computational, instrumental, organic, and analytical. Abstract Full Text (PDF) [Epub] Full Text (HTML)

7.

An Undergraduate-Level Electrochemical Investigation of Gold Nanoparticles-Modified Physically Small Carbon Electrodes Shaneel Chandra, Wycliff Tupiti, Sevlin Singh, Zafiar Naaz, Pritika K. Kishor, Archana Goundar, Malina Fakraufon, Surendra Prasad World Journal of Chemical Education. 2016 4 (5). doi: 10.12691/wjce-4-5-1 Keywords: upper-division undergraduate, laboratory instruction, physical chemistry, Hands-On Learning , electrochemistry, materials science, surface science Context: This paper reports an undergraduate experiment based on analytical chemistry, electrochemistry and materials science of carbon microelectrodes. The modification of the electroactive surface of the carbon microelectrode was done using gold nanoparticles electrodeposited from gold solution. To determine the changes on the surface, the electrode was subjected to simple optical microscopy. Next, the electrode was characterized using fast-scan cyclic voltammetry of two known electrochemical redox markers: hexaamineruthenium(III) chloride and potassium hexacyanoferrate (III), i.e. potassium ferricyanide. The redox behavior of both markers demonstrated the change in electrode surface. After modification, the ferricyanide reduction peaks were observed to increase significantly, as a consequence of accelerated electron transfer. Furthermore, changes in wave slope and half-wave potentials (E½) of the redox waves also confirmed an altered electrode surface that students can logically trace back to the modification. The electrode tip dimension was also determined using a modified form of the Cottrell equation, confirming the tip size to be 2.0 µm. The discussion of these results enables an understanding of electrochemistry, analytical chemistry and materials chemistry, and presents an excellent opportunity to apply these in an undergraduate setting. Abstract Full Text (PDF) [Epub] Full Text (HTML)

8.

Spectroelectrochemistry of Electrochromic and Electroluminescent Substances with Screen-Printed Electrodes and with an Optically Transparent Platinum Mesh Electrode Achim Habekost World Journal of Chemical Education. 2020 8 (2). doi: 10.12691/wjce-8-2-3 Keywords: second-year under graduate, laboratory instruction, physical chemistry, Hands-On Learning / manipulatives, electrochemistry, spectroscopy Context: Spectroelectrochemistry of Electrochromic and electroluminescent substances shows a strong correlation between electrochemical reactions on electrodes and changes in absorbance or luminescence adjacent to the electrode. This was demonstrated by the well-known substances methylviologen and tris (2,2’-bipyridyl) dichloro-ruthenium [Ru (bpy)3]2+. The experimental setup used a conventional potent iostat connected to a fiber spectrometer. Different commercial spectroelectrochemical cells were used: A thin-film absorption cell with a platinum mesh working electrode and as pecular reflection/transmission cell with different screen-printed electrodes. For luminescence measurements, a conventional quartz cuvette with the platinum mesh electrode was used. All cells were inserted into commercial cell holders with connectors for optical fibers. Spectroelectrochemistry becomes increasingly important as an analytical method. In addition, the empirically observed didactical problems of misunderstanding electrochemical electrode reactions can be overcome by visualizing the electrode processes in spectroelectrochemical measurements. The procedures followed in these experiments were designed for typical undergraduate students in electrochemistry. Abstract Full Text (PDF) [Epub] Full Text (HTML)

9.

Synthesis of a Crosslinked Epoxy Resin Medallion in the Organic Chemistry Laboratory Katherine W. Stickney, Joe C. Burnell, John T. Wyeth World Journal of Chemical Education. 2019 7 (4). doi: 10.12691/wjce-7-4-1 Keywords: interdisciplinary/multidisciplinary, laboratory instruction, organic chemistry, polymer chemistry, second-year undergraduate, upper-division undergraduate, Hands-On Learning /manipulatives, epoxides, polymerization Context: Polymer synthesis has a limited inclusion in most organic chemistry lecture curricula, so emphasizing the concepts of polymer chemistry in a laboratory setting gives students hands-on experience in new content and broadens the scope of the class. The details and outcomes of a robust and well-developed laboratory procedure for the synthesis of a crosslinked epoxy network polymer are described. This experiment has been a part of a first-semester, introductory undergraduate organic chemistry laboratory curriculum for more than two decades and has positively impacted over eight hundred students. The experiment had the unique aspect that students cured the resin in a round, seven-centimeter mold, forming a hardened epoxy disk. This disk, or medallion, was decorated in two different ways: first, a design was etched into the mold before curing to form a permanent imprint; second, the final epoxy medallion was decorated, post-cure, with colored permanent markers and glitter glue. After this laboratory experiment, students took home a durable ornament as a memento of their first-semester organic chemistry laboratory course. Abstract Full Text (PDF) [Epub] Full Text (HTML)

10.

Demonstrating Sustainable Biomass Utilization and Processing Using Ionic Liquids – An Introduction to Undergraduate Chemistry Laboratories Daniel Rauber, Michael Conrad, Johannes Huwer, Harald Natter, Rolf Hempelmann World Journal of Chemical Education. 2017 5 (5). doi: 10.12691/wjce-5-5-3 Keywords: ionic liquids, biomass, polymer chemistry, Hands-On Learning , green chemistry, material science, solvents Context: A more sustainable, greener chemistry aiming at the utilization of renewable resources is a main research focus to reduce human environmental impact. Unfortunately, there is a lack of powerful, environmentally benign solvents for the two most abundant renewable biopolymers, cellulose and lignin. Ionic liquids are here introduced to undergraduate chemistry laboratories as recyclable, tunable solvents for the dissolution and processing of biomass in the form of wood and its components to create alternative processes that are safer as well as waste- and additive-free. These experiments emphasize the principles of green chemistry and demonstrate the scope and potential of ionic liquids for the production of novel, biodegradable materials from renewable resources. Abstract Full Text (PDF) [Epub] Full Text (HTML)