The radioactive nature of technetium is discussed using a combination of introductory nuclear physics concepts and empirical trends observed in the chart of the nuclides and the periodic table of the elements. Trends such as the enhanced stability of nucleon pairs, magic numbers, and Mattauch's rule are described. The concepts of nuclear binding…

This paper describes a pedagogical approach to help students understand chemical bonding by emphasizing the importance of electrostatic interactions between atoms. The approach draws on prior studies that have indicated many misconceptions among students in understanding the nature of the chemical bond and energetics associated with bond formation…

The term "service-learning" generally refers to projects planned as components of academic coursework in which students use knowledge and skills taught in the course to address real needs in their communities. This kind of learning experience, which allows students to focus on critical, reflective thinking and civic responsibility, has…

Chemistry self-efficacy (CSE) was identified as a critical affective construct to predict student success in chemistry classrooms. We surveyed students at the beginning and toward the end of a semester to measure students' CSE beliefs in introductory and general chemistry courses at a Hispanic-serving institution in the United States. First, the…

Molecular processes are highly complex, and are frequently difficult for high school and college students to comprehend. Because of the importance of visualization in learning, along with formative assessment of student understanding, utilization of 3D modeling software aids both educators and students alike. The activity described below required…

Lab-based learning is an essential part of any undergraduate chemistry curriculum as it incorporates necessary and required hands-on experiential learning. However, in response to the COVID-19 pandemic, many students are learning from home, rendering laboratory instruction a particular challenge. Options for educators include third party virtual…

Growing class sizes and the rapid advancement of information technology have prompted institutions to implement blended learning in their academic offering. There are few reports in the literature on a holistic assessment of the effectiveness of the instructional design of blended learning courses for large classes. We defined effectiveness from a…

Hardy-Weinberg (HW) equilibrium and its accompanying equations are widely taught in introductory biology courses, but high math anxiety and low math proficiency have been suggested as two barriers to student success. Population-level Punnett squares have been presented as a potential tool for HW equilibrium, but actual data from classrooms have…

This study aims to investigate the main obstacles and barriers that affect Teaching Science in Saudi Universities and the Proposed Solutions during the COVID-19. The sample consists of 94 male and female students chosen randomly from different year groups in the department of science at Al-Qunfudah College at Umm Al-Qura University in Saudi…

As digital educational media use becomes more widespread, an opportunity exists to develop new methods to present abstract ideas to provide a more meaningful learning experience. Drawing from psychology and dynamic visualization research, new interactive tools can be thoughtfully designed but it is also necessary to establish how these media are…

Effective faculty professional development must be participant centered; tailored to the needs and interests of the faculty who engage in it. In order to better understand those needs and interests, we investigate how knowledge, attitudes, beliefs, and teaching practice vary among new physics faculty, using surveys of a large sample (n = 442) of…

Transfer of learning, the application of learning to different contexts over time, is important to all learning for development. As 21st century skills specifically aim to be "generic," there is an assumption that they can be transferred from context to context. We investigate the process of transfer in problem solving, with specific…

Enzyme purification, characterization, and identification are some of the best ways to introduce undergraduate students to many aspects of biochemistry, particularly as part of project-based learning (PBL). These kinds of multi-step laboratory experiments not only help students to better understand basic biochemistry concepts but also serve to…

Combinations of text and different types of pictures are commonplace in biology as in science in general. The single representations (i.e., text, picture) constituting a text-picture combination may contain redundant or complementary information. The ability to identify and integrate information in different kinds of text-picture combinations is…

An interactive, field-based course on the environmental aspects of natural water was developed as part of STEM initiatives at a comprehensive university in the United States. The project is funded by the National Science Foundation. The course is focused on two fundamental student skills, such as hydrologic field procedures and analytical methods.…