Electrocardiography (ECG) is one of the most widely used methods in clinical diagnosis. Here we describe an experimental approach that offers hands-on learning of its basic principles. An experimental model that consists of a rubber foil with a low electrical conductivity and a DC power unit is used to simulate the body and the electric dipole of…

Understanding metabolic function requires knowledge of the dynamics, interdependence, and regulation of metabolic networks. However, multiple professional societies have recognized that most undergraduate biochemistry students acquire only a surface-level understanding of metabolism. We hypothesized that guiding students through interactive…

A lack of familiarity with the lexical, grammatical, and discursive features associated with academic language presents comprehension challenges for many adolescent readers, especially those with still-developing English language skills. Although many studies focused on reading comprehension in content areas, the prevalent use of standardized…

The use of flipped classrooms has been gaining popularity across various disciplines as student-centered active learning pedagogy. In this study, an introductory organic chemistry course was delivered through flipped classroom methodologies, incorporating blended learning to deliver content and group work in the classroom. The learning experiences…

In this work the WIHIC (What is Happening In this Classroom) instrument was used to assess the types of interactions, from students' perspectives, that occur in two science classrooms in Trinidad & Tobago. It was the first attempt to use the WIHIC instrument in the research context. An exploratory case study research design in the quantitative…

Understanding simple electric DC circuits often represents a great challenge to many students in lower secondary schools. As a result, students' knowledge of this subject is often dominated by alternative conceptions, even after instruction. One of the reasons for these learning difficulties is the intangibility of key physical quantities and…

Chemicals used in academic teaching laboratories, research institutions, and industrial facilities are mostly dual-use chemicals. They provide many desired benefits but at the same time may cause adverse effects to human health and environments. In the case of Somalia, there are gaps in terms of chemical security (CS) awareness and…

It is imperative that a profound transformation be carried out in the traditional way in which we teach science subjects, so it is necessary that the role of student change from being a mere recipient of information to being the main player in the construction of his knowledge. One of the strategies to achieve this is to make use of ICT, within…

The STEM education has been emphasized in many countries around the world because of its benefits for students in the new century. In response to the STEM education, Next Generation Science Standard (NGSS) has released a new vision of science education in which learning disciplinary content and crosscutting concepts is to engage science and…

In this paper the development, use, and evaluation of tasks based on the construct of school-related content knowledge are described. The tasks were used in seminars on organic chemistry for bachelor and master preservice chemistry teachers at a German university. For the evaluation a questionnaire with open and closed items was used. The tasks…

Next Generation Sequencing (NGS) has become an important tool in the biological sciences and has a growing number of applications across medical fields. Currently, few undergraduate programs provide training in the design and implementation of NGS applications. Here, we describe an inquiry-based laboratory exercise for a college-level molecular…

Based on the control-value theory of achievement emotions, the study examines elementary school students' science performance and control-value beliefs (self-concept, intrinsic and achievement value) as antecedents of their cognitive (worry) and affective (nervousness) science anxiety. Performance in the science topic "floating and…

The authors describe the construction and use of tactile models for demonstrating intermolecular forces. These models are composed of inexpensive materials and can be used in college chemistry classrooms of varying levels including general and organic chemistry. The models were designed to be paired with an accompanying activity to encourage…

Introductory mechanics is an obligatory course for many disciplines outside of physics and the failure rate is often high. Even the students who pass the course often fail to achieve the main learning goal: The conceptual knowledge required for modeling situations with physics principles. In many cases, this is due to inefficient learning…

The research for teachers' conceptions of the outside educational materials, that they discover and use, is very limited. In addition, there is also particularly limited research comparing teachers' conceptions of the use of educational materials on the basis of the subject they teach. The present paper aims at investigating and comparing primary…