Shadows produced by sunlight reflected from convex surfaces can be very well defined. This article provides an explanation for this phenomenon as well as a demonstration/lab activity for students to investigate properties of shadows made from sunlight reflected by a curved surface.

The present paper examines whether there exists a change in the concentration of carbon dioxide that is trapped in the surgical facemask during the procedure of respiration and whether the results of the sequestered CO[subscript 2] can have harmful effects on the human organism. In order to answer the research questions, an experiment has been…

Electrochemistry, a key topic in introductory chemistry, is a topic that many students struggle with conceptually. Visual learning tools like concept maps allow the externalization of key concepts and the relationships between these concepts may aid in students' acquisition and retention of newly learned electrochemistry concepts. Partnering with…

This research integrates context-based learning and modelling. It presents a teaching-learning sequence (TLS) about the dissolution of gases in liquids using carbonated drinks as the context. The impact of the TLS is analysed in a longitudinal short-term study involving two groups of learners aged 13-14 years old (n=53). The results led us to…

In light of the proven benefits of high-quality afterschool STEM programming for teens, the author worked with colleagues at University of Maryland Extension to institute the Pollinator Ambassador program. The program was launched through a county-based 4-H program at a partner site in a community outside Washington, DC. Following the 4-H Thriving…

In recent years, there has been a growing concern in science education on the enhancement of preschoolers' knowledge and motivation for concepts by implementing efficient teaching methods. This study explored the development and effectiveness of the E-sky Module in increasing the development of preschoolers in Project-based Learning (PBL)…

While concept mapping is a valuable tool used to organize and represent ideas, the complexity and variability in how concepts are understood, connected, and represented make learners less receptive to using concept maps. Hence, it is important to employ scaffolding and motivational strategies to help students deal with complexity in working with…

Herbaria, collections of preserved plant specimens, have existed for 500 years as repositories of information about plants. Many of these collections are now being digitized, making them available to a much broader audience including students and teachers. Specimens can be used in a variety of different contexts in teaching biology, including from…

In response to the great challenge that the teaching of basic sciences currently entails in the new generations of young people and seeking to awaken the interest of our students in chemistry and its areas of influence, we developed an innovative card game named "Amino-structure" which served as a key tool to implement an active learning…

This study aimed to evaluate the effectiveness of a design thinking teaching and learning model on students' design thinking skills in science class. The study utilised two projects, 'Making a Simple Solar Water Heater' and 'Drawing a 3D Topographic Map of Zhejiang Province,' based on the 5th-grade science curriculum in China, and involved 45…

It is crucial for students with learning disabilities (SLDs) to possess psychological resilience in order to pursue their careers as entrepreneurial individuals. One of the areas where entrepreneurship skills are taught in middle school is in science courses. This shows the importance of teaching psychological resilience in science courses. On the…

Non-rigid spatial thinking, or mental transformations where the distance between two points in an object changes (e.g., folding, breaking, bending), is required for many STEM fields but remains critically understudied. We developed and tested a non-rigid, ductile spatial skill measure based on reasoning about knots with 279 US adults (M = 30.90,…

Most of the tools developed in the area of "Science Education" aimed at analyzing either the product or the process of argumentation do not consider the following: (1) arguments are a part of dialogues; (2) dialogues present different objectives; (3) dialogues start from different assumptions; and (4) dialogues shape the roles and moves…

Schools have a vital role to play in helping young people understand and engage with the pressing issues of our time. More effective and engaging climate education can help prepare them to play their part in combatting climate change. Practical science activities, such as those promoted in the CREST Awards hydrology resources described here, can…

Many studies have characterized students' difficulties in understanding and reasoning about scientific mechanisms. Some of those studies have drawn implications on teaching mechanisms and how to guide students while reasoning mechanistically. In this theoretical article, I claim that one component that has not garnered much attention in the…