An essential goal for physics and optical science instructors is to encourage students to find excitement and beauty in physical and optical phenomena while helping them learn the theoretical concepts and conducting experiments that can test the validity of the concepts. Such motivation largely relies on realistic hands-on lab opportunities where…

"Learning by doing" involves completing a practice activity through the method of inquiry. This study combined the predict-observe-explain (POE) inquiry method and hands-on doing processes to develop a cycle-mode POED (predict-observe-explain-do) model with an e-learning system to help students complete a practice activity using…

The widely explored but still unresolved question about the contribution of the application of different ways of performing experiments in the integrated natural sciences is addressed in this research. The aim was to determine the contribution of demonstration hands-on experiments (DHE) and student hands-on experiments (SHE) in relation to…

On the basis of recent advances in battery research and technology, we have developed a novel laboratory exercise centered on an organic--inorganic battery using the redox chemistry of the organic molecule anthraquinone-2,7-disulfonic acid disodium salt (AQDS). Although most commercially available batteries are based on inorganic redox couples,…

Learning by engaging in the practices of a discipline (practice-based learning) provides museum visitors with opportunities to construct understandings that build on their prior experiences and interests. However, effectively facilitating such learning experiences is difficult. We present a framework that supports facilitators in providing…

Acquiring a basic understanding about the composition of crystal structures and the resulting structure-property relationship is central for chemists and material chemists, enabling the prediction of desired properties and the solution of a wide range of current challenges in sciences, e.g., the development of clean-energy storage. For a deeper…

A laboratory experiment has been developed to illustrate the transformation of silver nanoparticles (Ag NPs) in water containing phosphate anions. The experiment, conducted by high school students, involved hands-on learning to synthesize and characterize Ag NPs via ultraviolet-visible (UV-vis) spectroscopy. This was followed by a UV-vis probe of…

A laboratory experiment is detailed that entails the separation and derivatization of the artificial sweetener sucralose from a commercially available sweetener mixture. The experiment utilizes 1 g packets of a sucralose-based artificial sweetener and involves the separation of the synthetic sweetener from the more polar bulk additives by…

A reliable method for bleach-based alcohol oxidation has been developed. Use of sodium bisulfate as the acid additive in the reaction mixture eliminates the various problems associated with acetic acid, which has commonly been used for this type of oxidation. By conducting the reaction in an ethyl acetate/water two-phase reaction mixture,…

NMR is a fundamental part of any undergraduate chemistry degree, and training students how to measure and interpret NMR spectra is essential for postgraduate research or chemistry-based careers. Traditionally, the undergraduate laboratory experience with NMR is restricted to sample submission for NMR analysis, which is typically conducted by a…

A laboratory experiment utilizing locally available Indian Gooseberry ("Phyllanthus emblica" Linn.) extract as a bioreagent to determine iron(III) is described with the goal of providing students with hands-on experience in spectrophotometry and green chemistry. Spectrophotometry was used to measure the concentration of the complex…

This study investigated the influence of the demo kit on remediating misconceptions held by senior school students in mitosis and meiosis. The quasi-experimental design of the pre-test, post-test, non-equivalent control group was adopted for the study. A multistage sampling technique was used to select 60 male and female biology students from two…

Students need procedural understanding--that is, knowledge of the procedures that scientists use to establish scientific evidence (also known as "concepts of evidence"), to successfully perform scientific investigations, and to evaluate public and scientific claims. However, concepts of evidence are seldom explicitly targeted in routine…

This project involves students in a course-based undergraduate research experience (CURE) as part of the traditional introductory biology laboratory course. Recently, research has shown that student engagement in authentic research has significant positive impacts on students, such as development of science literacy and reasoning skills. Being…

Founded in 2011, the Bay Area Science Festival (BASF), led by the Science and Health Education Partnership (SEP) at UC San Francisco, brings together academic, scientific, corporate and civic groups to develop and lead STEM (science, technology, engineering, and mathematics) events for all ages. From 2011-2019, the Festival hosted over 50 events…