Nitrate is a crucial parameter for assessing water quality, owing to its dual function in ecological systems. These functions can be beneficial or detrimental depending on whether nitrate concentrations are low or high, respectively. The ultraviolet spectrophotometric method (standard as 4500-NO[subscript 3]--B) is a classic method for determining…

Scientific Practices play a central role in the Next Generation Science Standards, influencing the standards of more than 70% of students in the United States. Therefore, a view of what has been studied about Scientific Practices in Science Education, globally in the past decade is relevant. Thus, 44 articles from international journals in Science…

Competence-based, science e-testing (CBSeT) is a novel external assessment tool which provides feedback to science teachers about their students' competence-based skills, thereby giving relevant assessment information which teachers could potentially use in their teaching practice. The aim of this study was to determine the extent to which…

There is a contradiction in the literature about the effect of REACT strategy on science achievement. This study aims to resolve this contradiction by determining the effect of REACT strategy on student science achievement and the factors affecting this strategy by integrating findings obtained from both qualitative and quantitative studies. The…

To help teachers implement new, research-based approaches for leveraging technology to improve science, technology, engineering and mathematics (STEM) learning, a systematic review of the research literature on the impact of integrating innovative digital technology in STEM and computer science curricula and classrooms was conducted. For purposes…

The Qualifications Regulator in England (Ofqual) has decided that with the implementation of revised (linear) science specifications, first teaching from September 2015, the assessment of practical skills will not contribute to the overall qualification grade. This could have significant implications for post-16 science teaching. The decision was…

There is limited research available in the area of science education for deaf children. In the twenty-first century, the importance of science and specifically scientific argumentation cannot be overlooked as a vital aspect of the curriculum. Current science teaching presents a range of difficulties for deaf students particularly when abstract…

This article describes a first-grade research project that incorporates trade books and challenges misconceptions. Educators see the power of their students' wonder at work in their classrooms on a daily basis. This wonder must be nourished by students' own experiences--observing the moon on a crystal clear night--as well as by having…

The shift from science inquiry to science practices as recommended in the US reports "A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas" and the "Next Generation Science Standards" has implications for classroom/school level instruction and assessment practices and, therefore, for…

Assessments, understood as tools for tracking what and how well students have learned, play a critical role in the classroom. "Developing Assessments for the Next Generation Science Standards" develops an approach to science assessment to meet the vision of science education for the future as it has been elaborated in "A Framework…

The new National Curriculum Programme of Study for primary science in England includes most of the topics with which primary teachers are familiar. However, when looking at the science enquiry section, the changes are much more far-reaching. Science enquiry has been renamed as "working scientifically" and is integrated with developing…

The study reviewed in this paper examined three separate methods for teaching the "control of variables strategy" ("CVS"), a procedure for conducting a science experiment so that only one variable is tested and all others are held constant, or "controlled." The study analyzed data from a randomized controlled trial of…

An evidence centered design approach was used to develop, implement, and assess a novel and innovative digital pipetting badge using Purdue's Passport system. Each student in a large lecture course created a video demonstrating how to use a 10 mL pipet to dispense liquid. The video was uploaded into the Passport system, which allowed instructors…

A perceived difficulty is associated with physics problem solving from a learner's viewpoint, arising out of a multitude of reasons. In this paper, we have examined the microstructure of students' thought processes during physics problem solving by combining the analysis of responses to multiple-choice questions and semistructured student…

In delivering chemistry courses by distance, a key challenge is to offer the learner an authentic and meaningful laboratory experience that still provides the rigour required to continue on in science. To satisfy this need, two distance general chemistry laboratory courses appropriate for Bachelor of Science (B.Sc.) students, including chemistry…