This work presents a simple analogue waterproof temperature probe design and its electronic interfacing with a computer to compose a data acquisition system for water temperature measurement. It also demonstrates the system usage through an experiment to verify the water heating period with an electric heater and another to verify the Newton's law…

The nucleophilic aromatic substitution reaction and thia-Michael addition using thiourea as an odorless, cheap, and easy-to-handle sulfur source in water are described, which can be used to teach upper-division undergraduates the role of thiourea in the formation of C-S bonds and the principles of green chemistry. The use of a cheap, nontoxic…

This article describes a new competence-oriented teaching rationale for a science course, developed in Germany through close cooperation between teachers and researchers, that seeks to improve scientific literacy at upper-level secondary school (ages 15-17). Its aim is to help students become independent and competent experimenters by combining…

Secondary and post-secondary science and engineering educators share common class arrangements with both a laboratory and lecture component, coordinating both components so they build upon each other to create meaningful learning experiences. The COVID-19 pandemic forced educators to convert lectures and exams to online delivery. Doing so came…

Aim/Purpose: The objective of this study is to explore the effectiveness of using virtual experiments on students' level of achievement and on their practical skills as well as their views on applying the virtual experiments in a general physics lab. Background: There is a continuous debate in the literature on the effect of using virtual…

One way of ensuring gender equality in science education is by mainstreaming gender components into the pedagogical delivery of science instruction. Thus, the researchers in this study designed a Gender Responsive Collaborative Learning Strategy (GR-CLS) based on Universal Design for Learning (UDL) principles. The effectiveness of this…

The Science of Human Health is an undergraduate chemistry course for non-science majors. This course presents chemistry content following a systems thinking approach and was created with the goal of providing students with the necessary chemistry foundation to make informed decisions which will affect their own well-being and their global…

This study aims to examine the influence of inquiry-based instruction on eighth-grade male and female students' motivation and engagement in science learning in two public junior high schools in central Taiwan. Mixed-methods methodology was adopted with 60 students (32 males and 28 females) in the experimental group and 56 students (28 males and…

A green chemistry experiment is presented for teaching an undergraduate quantitative analysis/analytical chemistry laboratory class through the use of black tea leaf extract for the determination of iron in supplement tablets. Dried tea leaf is a safe, low cost, and widely available source of natural extract that can be used in place of more toxic…

To investigate how early elementary science and technology (S&T) education, with hands-on experimentation and inquiry-based learning, impacts pre-service teachers' attitudes and confidence to teach S&T education, we used a cross-sectional survey. Our participants were 27 pre-service teachers enrolled in an Ontario elementary S&T…

This paper presents a method to measure the movement of an object from specific locations on a straight line using an iPhone's magnetometer. In this method, called "magnetogate," an iPhone is placed on a moving object (in this case a toy car) and small neodymium magnets are arranged at equal intervals on one side of a straight line. The…

This article describes an experiment teaching polarization phenomena and the Triboelectric Series in a unit on electrostatics. Using rods (2-3 ft in length) made from wood, aluminum, PVC, and Plexiglas on an inverted watch glass, these items demonstrated to the class how a party balloon rubbed with fake rabbit fur (charging the balloon negative)…

Experiments that measure the speed of sound in air are common in high schools and colleges. In the Kundt's tube experiment, a horizontal air column is adjusted until a resonance mode is achieved for a specific frequency of sound. When this happens, the cork dust in the tube is disturbed at the displacement antinode regions. The location of the…

This paper describes a simple experiment that lets first-year physics and engineering students discover an important physical property of a Slinky. The restoring force for the fundamental oscillation frequency is provided only by those coils between the support and the Slinky center of mass.

Melton demonstrated a surprising disappearance using total internal reflection. When he put a Florence flask filled with marbles into a water tank and looked straight down from directly above the flask, he was only able to see marbles above a certain water level. When he added more water into the tank above the top line of the marbles, all of the…