This paper reports on our use of a fine-grained learning progression to assess secondary students' reasoning through carbon-transforming processes (photosynthesis, respiration, biosynthesis). Based on previous studies, we developed a learning progression with four progress variables: explaining mass changes, explaining energy transformations,…

The objectives of the research were to identify the difficulty level of various types of chemical representation for students and to examine the effects of two different models of teaching and learning chemistry (problem-solving based on multiple representations and problem-solving) on the students' cognitive achievement in chemical equilibrium.…

A decline in the number of students opting to study science in high school is a matter of international concern, particularly in relation to students who demonstrate high academic ability in science. These high-ability students have the potential to be the innovators and leaders of the future. There is a paucity of research that provides insight…

Argument skills play a crucial role in fostering students' scientific literacy. Students who possess such skills can employ reason and evidence to make decisions. This classroom action research was aimed at investigating the best practices for teaching chemistry to promote argument skills through socioscientific issues (SSI). The participants were…

In this article the authors describe an Integrative Science Technology Engineering and Mathematics (STEM) Education Design-Based Learning (I-STEM ED DBL) activity that invites students to delve into the science, technology, and engineering related to the production of Ötzi's copper axe and to speculate about the circumstances surrounding his…

In the past ten years, increasing evidence has demonstrated that scientific teaching and active learning improve student retention and learning gains in the sciences. Graduate teaching assistants (GTAs), who play an important role in undergraduate education at many universities, require training in these methods to encourage implementation,…

Undergraduate research is a high impact educational practice that encourages more women to engage in science. Few studies have focused on gender concordance between mentors and mentees within the context of summer undergraduate research programs, and none have linked gender concordance with student gains. Previous research has more often…

This paper introduces Ladders of Learning (LLs) as a tool for structuring learning content and the teaching process in a transparent way for students. Learning material for a LL for Bohr's atomic model was developed by cooperation between chemistry teachers and university researchers and implemented in grade-eight chemistry classes. For evaluating…

Laboratories play a crucial role in the undergraduate science curriculum and the effectiveness of learning in laboratories is influenced by learners' interactions with other students, the instructors, and the equipment used. In this study, a pre-lab survey was used to collect information about students' expectations of interactions in chemistry…

This study is composed of several projects in the field of physics education research. First, investigations into flipped physics classrooms at the senior and graduate level show that students uniformly agree that the active learning techniques (peer instruction, group problem solving, etc.) were beneficial to their learning regardless of their…

The National Center for Education Statistics (NCES, 2017) reported that literacy scores have not significantly improved in over 20 years. These scores have prompted investigations of instruction for improving literacy instruction, such as disciplinary literacy (DL), but research supporting DL implementation is limited (Fisher & Ivey, 2005;…

Characterization of the vapor pressure of a volatile liquid or azeotropic mixture, and its fluid phase diagram, can be achieved with an isoteniscope and an industrial grade digital pressure sensor using the experimental method reported in this study. We describe vapor-pressure measurements of acetone and n-hexane and their azeotrope, and how the…

The synthesis of 1,1-diphenylethylene (DPE) via a Grignard reaction, followed by an acid-catalyzed dehydration reaction, yields a mixture of compounds. DPE is a high boiling liquid that cannot be purified using simple distillation. However, it is easily separated from the more polar starting material and intermediate alcohol using both thin layer…

One of the challenges of science education is to integrate activities, content, and tools in a meaningful manner. One way to address this challenging goal is the transformation of authentic scientific practices into contexts for learning, in line with sociocultural activity theory. In this respect, authentic scientific practices are interpreted as…

In this experiment for an upper-division course in organic structure determination, each student prepares an unknown compound and characterizes the product using multiple spectroscopic techniques. The unknowns, 2-aryl-substituted 1,4-dihydro-3,1-benzoxazines and 1,2,3,4-tetrahydroquinazolines, are prepared in a single step by the condensation of…