A multioutcome, guided inquiry-based liquid--liquid extraction (LLE) experiment has been designed for introductory organic chemistry. Multiple outcomes were established by identifying a series of red and blue dyes that are (1) soluble in organic solvent, (2) soluble in aqueous solution, or (3) soluble in either the organic or aqueous layers by…

Problem Roulette (PR), an online study service at the University of Michigan, offers points-free formative practice to students preparing for examinations in introductory science, technology, engineering, and mathematics courses. Using four years of PR data involving millions of problem attempts by thousands of students, we quantify the benefits…

As a foundational evolutionary concept, the Hardy-Weinberg principle should be taught enthusiastically in introductory biology courses. In a companion Perspectives paper, I made the case that students are often given limited or incorrect information on the HW principle due to a lack of mastery or confidence on the part of their teachers. The…

Le Châtelier's principle is used as a basis to derive an expression to calculate solution pH during titrations that involve only strong acids and strong bases. Central to this model are the reaction quotient and a re-equilibration term that represents the extent of neutralization during a titration. Unlike the method traditionally taught to…

An important but challenging problem-solving technique in introductory mechanics is that of using "tilted axes." For inclined plane and centripetal motion problems, using axes that are aligned relative to the ramp direction or the radial direction (rather than the horizontal and vertical) yields equations that are conceptually more…

Chemical engineering problems often involve the solution of systems of nonlinear algebraic equations (NLE). There are several software packages that can be used for solving NLE systems, but they may occasionally fail, especially in cases where the mathematical model contains discontinuities and/or regions where some of the functions are undefined.…

The need to develop clean-energy storage systems, harvesting technologies, and new functional materials are but a few of the many contemporary challenges in the domain of science today. To address these challenges, problem solving has become a key skill of the 21st century. It is generally documented, however, that experts and students differ in…

The case study described in this article focused on a topic of real national concern, landslides, which can trigger sudden and tragic environmental problems and bring considerable loss of life. Landslides occur in many parts of Thailand, for example on mountain slopes, areas eroded by water or areas with rock degradation (Department of Mineral…

Novel assessment tools are more often used in class especially after the Bologna Process (Pereira, D.; Flores, M. A.; Niklasson, I. Assess. "Eval. Higher Educ." 2016, 41, (7), 1008-1032, DOI: 10.1080/02602938.2015.1055233) in Europe. "Kahoot" has emerged as an attractive and interactive gaming platform, and considerable…

Mathematics is of major importance in science subjects. Unfortunately, students struggle with applying mathematics in science subjects, especially physics. In this qualitative study we demonstrate that transfer of algebraic skills from mathematics in physics class can be improved by using pre-knowledge effectively. We designed shift-problems…

This research study was conducted to examine the effectiveness of activity-based science teaching practices on the acquisition of problem-solving skills for 5-6 year old preschool children. A total of 32 children were included in this research study. The Personal Information Form and 4-7 Age Problem Solving Ability Scale were used as the data…

The flipped classroom is a relatively new active learning pedagogical intervention, gaining popularity as a blended learning methodology. The flipped classroom comprises two distinct parts, directed learning carried out at the student's own pace away from the classroom and an interactive, class-based activity encouraging problem-solving and…

Research has demonstrated that academically successful students are effective, self-regulated learners. Moreover, exam wrapper interventions have been shown to foster the development of self-regulated learning behaviors on the part of college students. In this naturalistic, qualitative, and exploratory study, an exam wrapper intervention was…

The learning model is one of the critical factors in boosting student to have good learning motivation (LM) and cognitive competencies (CC). In two academic years (2016-2017), only 19.6% of Senior High School (SHS) students in Samarinda passed minimal competence in Biology subject. This research was conducted to find out a better learning model in…

"Kurikulum Merdeka" is a learning experience framework that offers flexibility and focuses on essential content, character development, and students' competencies. Teachers had the discretion to develop their modules to choose, design, and organize the learning contents for students, based on their needs. By using that module, there is…