Mass balance (MB) reasoning offers a rich topic for examination of students' scientific thinking and skills, as it requires students to account for multiple inputs and outputs within a system and apply covariational reasoning. Using previously validated constructed response prompts for MB, we examined 1,920 student-constructed responses (CRs)…

Models and modeling are central to both scientific literacy and practices as demonstrated by the Next Generation Science Standards. Through a design-based research framework, we developed a model-based assessment (MBA) and associated rubric as tools for teachers to understand and support students in their conceptualization of the flow of energy…

Drawing, constructing, and explaining a model of a given abstract phenomenon is a challenging task. In this study, students were engaged in the "Project-Based Inquiry Science (PBIS)-Air Quality" learning unit, as part of their chemistry curriculum. The study aim is to determine how well students understand chemistry conceptually after…

This paper uses evidence-centered assessment design (ECD) to structure and analyze a laboratory activity where students collect and represent titration curve data to determine acid strength in terms of molarity and dissociation constant. Following principles of multidimensional learning, the activity prompts students to demonstrate knowledge of…

21st century teaching and learning emphasize the full engagement of students for improving their critical thinking and cooperation and the construction of the knowledge that demonstrates deep understanding. However, significant studies reported chemistry as a challenging subject caused of abstract concepts, phenomena and ways used in teaching and…

The Conceptual Survey of Electricity and Magnetism (CSEM) is a widely used multiple-choice instrument measuring a student's conceptual understanding of electricity and magnetism. This study applied modified module analysis (MMA) and modified module analysis-partial (MMA-P), network analytic methods that identify groups of correlated responses, to…

The aims of the study were analyzing students' understanding and skills to make concept mapping in work energy matter through C-Map application software. True experimental method with randomized control group pre-test and post-test design was utilized in the research method. The research involved 72 public high school students from second…

We studied the impact of metacognitive reflections on recently-completed work as a way to improve the retention of newly learned problem-solving techniques. Students video recorded themselves talking through problems immediately after finishing them, completed ongoing problem-solving strategy maps or problem-sorting exercises, and filled out…

When teachers first wrap their heads around scientific modeling, it can be a bit tricky to distinguish scientific models from diagrams and three-dimensional models. If a fifth grader draws and labels a food web, it's a model. Right? Not necessarily. When creating a model, students should be representing a system inspired by an inquiry or…

This article presents a study focused on analysing the effectiveness of an activity about the use of analogies in science communication. The activity consisted of reading two science articles published in a prestigious digital newspaper about the first image of a black hole. The purpose was (i) to identify and analyse the analogies used in the…

Evaluation of student written work during summative assessments is an important task for instructors at all educational levels. Nevertheless, few research studies exist that provide insights into how different instructors approach this task. In this study, we characterised variation in chemistry instructors' approaches to the evaluation and…

In an effort to improve student conceptual understanding and help students better connect pre-existing knowledge to new ideas, a concept map assignment was implemented in a first-year college level general chemistry course. This implementation included a quasi-experiment that was carried out in discussion group recitation sections within a…

I examined the impact of a self-diagnosis activity on students' conceptual understanding and achievements in physics. This activity requires students to self-diagnose their solutions to problems that they have solved on their own--namely, to identify and explain their errors--and self-score them--that is, assign scores to their solutions--aided by…

In this featured lesson, entitled "Fishy Feeding Frenzy," fourth-grade students engage in a classic science activity that requires them to experience the interdependent relationships of organisms in an ecosystem. The students explore how adaptations increase the survival of a member of a species by participating in an active "fishy…

In an introductory biology course, we implemented a learner-centered, model-based pedagogy that frequently engaged students in building conceptual models to explain how genes determine phenotypes. Model-building tasks were incorporated within case studies and aimed at eliciting students' understanding of 1) the origin of variation in a population…