Given the potential impact of introductory science laboratories on postsecondary students' science learning, careful thinking is needed about how to support teaching assistants (TAs) to create opportunities for their students to reason about science. Research suggests that teachers are best positioned to improve their teaching practices when they…

A national survey of chemists (n = 174) explored the self-reported format and focus of postsecondary inorganic chemistry instructional laboratory curricula. Multiple instructional laboratory course formats were observed, including stand-alone inorganic chemistry instructional laboratory courses, inorganic chemistry laboratory instruction as a…

The work in this dissertation is presented in two parts. The first part (Chapters 3 and 4) details work relating to students' explanations of reaction mechanisms in organic chemistry. The second part (Chapters 5 and 6) details work relating to the evaluating the uptake of research-based instructional practices in introductory chemistry,…

This paper examines the affordances of physical objects (e.g. apparatus, models, manipulatives) as they were used by teachers and students to make meaning in coordination with their speech and gestures. Despite the pervasive use of physical objects as material and tactile resources in hands-on investigations or demonstrations, there have been few…

The number of students with disabilities and specifically students with attention-deficit hyperactivity disorder (ADHD) entering postsecondary STEM education has been increasing in recent decades. However, many instructors and popular research-based curricula are not prepared to support such learner variation. The views and experiences of people…

Effective science instruction requires knowledge of subject matter and scientific practices (Next Generation Science Standards (NGSS), 2013), as well as the context within which learning occurs (Anthony, Hunter and Hunter 2014). For science teachers, there is often a tension between the efficiency of lecture and student engagement that comes with…

There are many challenges associated with Inquiry-Based Practical Work (IBPW), scattered in the school and post-school natural sciences education research literature. The goal of the systematic review presented in this paper, was to gather the contextual teaching challenges in the said literature, and then to create a detailed multi-perspective…

Pedagogies of engagement (i.e., Peer-Led Teaming Learning, Problem-Based Learning, and Process-Oriented Guided Inquiry Learning) are active learning approaches used in postsecondary chemistry courses. In this study, we use data from a national survey of postsecondary chemistry instructors in the United States to estimate use of three pedagogies in…

Redox reactions are considered one of the most difficult chemistry subjects to teach and learn. However, this is an important content that permeates several topics and includes many everyday life-related phenomena. To understand the teaching and learning difficulties of the 'redox reactions' topic, a systematic literature review was conducted.…

Research has focused on identifying and overcoming determinants that impede widespread adoption of instructional interventions, with little empirical examination of postsecondary educators' perceptions about these interventions. We explored postsecondary biology educators' sensemaking of education improvement interventions targeting undergraduate…

Deaf/hard-of-hearing postsecondary students may have some misconceptions surrounding scientific concepts that might be partially ascribed to a lack of access to culturally-responsive forms of pedagogy. The Deaf and hard-of-hearing community is diverse in communication modes, including those who use American Sign Language as their primary language,…

Curriculum and lesson planning require the consideration of many things. With a shift to the "Next Generation Science Standards" ("NGSS"), integrating the dimensions of science and engineering practices, disciplinary core ideas, and crosscutting concepts becomes a focus of that planning. The author, Betsy O'Day, an elementary…

Individuals who are deaf and hard-of-hearing (DHH) are underrepresented in science, technology, engineering, and mathematics (STEM) professions, and this may be due in part to their level of preparation in the development and retention of mathematical and problem-solving skills. An approach was developed that incorporates experiential learning and…

Though guided-inquiry learning, discovery learning, student-centered learning, and problem-based learning are commonly believed to be recent new approaches to the teaching of chemistry, in fact, the concept dates back to the late 19th century. Here, we will show that it was the British chemist, Henry Armstrong, who pioneered this technique,…

The impact of social media, such as Facebook in various fields including education is undeniable. The main objective of this study is to examine the effect of the interaction between students' learning styles and learning approaches on their achievements in the chemistry subject using the Problem-Based Learning (PBL) method through Facebook. The…