Studies have investigated various aspects of the use of questions in science lessons, but there is still a lack of research that demonstrates how, during peer reflection, teachers learn through identifying and overcoming obstacles to their own questioning in their professional development process. The present study is aimed at analyzing the types…

London dispersion forces (LDFs) are the most fundamental of the noncovalent interactions in that they are interactions that act between all molecular species and require only that students can use the "electron cloud" model of atomic structure. In this longitudinal study we investigate how students respond to prompts, designed to elicit…

The combined lab and lecture course is designed around the themes of colorants (dyestuffs and pigments) and fibers (natural and human-made) for nonscience majors. Students dye natural and synthetic fibers with natural dyes such as turmeric, raspberries, tea, and cochineal insects as well as synthetic dyes. The students observe the colorfast…

Being able to understand and evaluate arguments in different modalities and in different disciplines is thought to be a key component of students' academic success in college. However, many students do not receive explicit instruction in the basic concepts and rules of argumentation. Using a difference-in-differences approach with a multicohort…

The implementation of a web-based stereochemistry tutorial, which allows students to select their preferred structural representation and method for making stereochemical comparisons between molecules, is discussed. The tutorial was evaluated by students in three different introductory organic chemistry courses at a large midwestern university.…

This paper presents the findings of a study that explored the link between teachers' views on the challenges to inquiry-based science teaching (IBST) practice in the chemistry classroom and their need for professional development. The study used a multiple case study design and collected data using interviews. Participants were purposively…

The purpose of the study was to find out the effects of existing physical environment of chemistry lab on cognitive learning of chemistry students in the rural and urban schools of Rawalpindi Division at secondary school level. The population of the study consisted of all science teachers and science students of all male and female schools in…

How, when and what kind of learning takes place are key questions in all educational environments. School graduates are expected to have reached a development level whereby they have, among many fundamental skills, the ability to think critically, to plan their studies and their future, and to integrate knowledge across disciplines. However, it is…

A physical organic chemistry experiment is described for second-year college students. Students performed nucleophilic aromatic substitution (NAS) reactions on 5,10,15,20-tetrakis(2,3,4,5,6-pentafluorophenyl)porphyrin (TPPF[subscript 20]) using three different nucleophiles. Substitution occurs preferentially at the 4-position ("para")…

Success in chemistry in the 21st century requires not only a mastery of important chemical concepts, but also the skills to apply this knowledge to important societal issues and the ability to effectively convey scientific information using a range of media. In response to this challenge we have developed an innovative four-credit seminar that…

Routinely used in quantitative determination of various analytes, UV-vis spectroscopy is commonly taught in undergraduate chemistry laboratory courses. Because the technique measures the absorbance of light through the samples, losses from reflection and scattering by large molecules interfere with the measurement. To emphasize the importance of…

Practical work is an essential component of science education. However, insufficient approaches towards practical work can limit the potential it has for promoting both students' motivation and situational interest. One suggestion to solve this problem is to use alternative forms of lab instruction which are both motivating and easy to comprehend.…

Lab-on-a-chip technology is brought into the classroom through development of a lesson series with hands-on practicals. Students can discover the principles of microfluidics with different practicals covering laminar flow, micromixing, and droplet generation, as well as trapping and counting beads. A quite affordable novel production technique…

Background: Recently, there is a growing interest in independent learning approaches globally. This is, at least in part, due to an increased demand for so-called "21st century skills" and the potential of independent learning to improve student skills to better prepare them for the future. Purpose: This paper reports a study that…

Educational researchers have explored the importance of performance, recognition, and interest in establishing and maintaining a STEM identity. Research has also demonstrated that the ways students describe themselves and how they participate in STEM communities can provide insight into their role identity salience; however, there has been little…