Chemistry self-efficacy beliefs have been defined as someone's beliefs about his or her own capability to perform a given chemistry task. These beliefs, one of the affective variables in the laboratory practices which are quite effective for learning science, affect individuals' accomplishment, motivation and anxiety. Self-efficacy is task and…

This study better research aimed King-Dow Su at strategic applications for exploring students' learning performances with conceptual understanding and algorithmic proficiency by problem-solving maps and six major learning activities. A quasi-experimental method was employed to detect the outcomes of students' compared intervention, together with…

In the United States with the Next Generation Science Standards (NGSS)'s emphasis on learning science while doing science, laboratory activities in the secondary school chemistry continues to be an important component of a strong curriculum. Laboratory equipment and consumable materials create a unique expense which chemistry teachers and schools…

Background: Problem-based learning (PBL) as a teaching strategy has recently become quite widespread in especially chemistry classes. Research has found that students, from elementary through college, have many alternative conceptions regarding "enthalpy changes in systems." Although there are several studies focused on identifying…

This study investigated the development of Bhutanese students' views of the nature of science (NOS) as they engaged in an explicit and reflective approach. Seven aspects of NOS were integrated into the chemistry content in two learning units titled "matter and its composition" and "study of gas laws" over a time span of 6 weeks…

As well as providing a valuable and enjoyable experience for pupils, outdoor learning also enhances and contextualises learning in science by helping pupils understand science concepts. Teachers' lack of confidence in which aspects of the science curriculum they can actually teach outdoors deters them from venturing outside the classroom for…

This research aimed at describing the effectiveness of the local culture-based 7E learning cycle model in improving students' critical thinking skills in chemistry learning. It was an experimental research with post-test only control group design. The population was the eleventh-grade students of senior high schools in Singaraja, Indonesia. The…

In this study, we sought to examine the influence of a 12-week design-based elective Science, Technology, Engineering, and Mathematics (STEM) course on pre-service chemistry teachers' content knowledge, STEM conceptions, and engineering and engineering design views. To attain the goals determined, we utilized five STEM activities starting with a…

Understanding how scientific conclusions are drawn from data is central to learning about the nature of science. Many students struggle with aspects of reasoning from data, including identifying relationships among variables, interpreting graphs, coordinating theory and evidence, and not allowing personal beliefs to outweigh the data when forming…

Identification and quantification of an unknown illicit drug (cocaine) from both simulated drug paraphernalia and simulated urine can be achieved via direct analysis in real time (DART) triple quadrupole linear ion trap (QTRAP) mass spectrometry (MS). We describe a novel, hands-on laboratory activity which utilizes the recent DART technology…

The objective of the research was to determine the effect that a metacognitive scaffolding for Web information searches exercises on the development of school students, through a general chemistry course in a blended learning modality. One hundred and four students from a school of the city of Bogotá D.C.-Colombia participated in the study. The…

Introducing Nanoscience and Nanotechnology (NST) topics into school science curricula is considered useful for an in-depth understanding of the content, processes and nature of science and technology, and also for negotiating the social aspects of science. This study examines (a) the development of an inquiry-based Teaching-Learning Sequence (TLS)…

We investigated how new ideas become accepted for Nobel laureates in science. Archival data were collected for 204 Nobel laureates from 1980 to 2009 in physics, chemistry, and medicine or physiology. Acceptance was evaluated for Nobel laureates by Prize area and three key publications in the Nobel laureates' publishing careers: (a) first…

Most undergraduate mass transfer and separation courses cover the design of distillation columns, and many undergraduate laboratories have distillation experiments. In many cases, the treatment is restricted to simple column configurations and simplifying assumptions are made so as to convey only the basic concepts. In industry, the analysis of a…

A pipet filler port has been constructed from a 1/4 in. NPT-1/4 in. or -3/8 in. barbed end Kynar plastic male connector fitting and a washer (cut from a latex rubber hose) inserted into the NPT end. The barbed end can secure reliably different sized rubber bulbs such as 1 oz (30 mL pipet capacity) and 2 oz (60 mL pipet capacity) types, and the 1/4…