Teachers consider many different kinds of factors in determining student grades. They use a mix of achievement and non-achievement factors in grading decisions, to the criticism of educational measurement experts (Brookhart, 1991; Brookhart, 1993; Frary et al., 1993; Popham, 2009). The factors that influence this decision making are particularly…

The "Framework for K-12 Science Education" and the Next Generation Science Standards have called on teachers to shift from having students "learn about" science topics to having students engage in a process of "figuring out" how and why natural phenomena occur. These reform documents push teachers away from a…

The most recent science education reform, the Next Generation Science Standards (NRC, 2012) set forth a new and ambitious agenda for science education. These standards go beyond all of the previous versions and combine three dimensions: disciplinary core ideas, science practices and crosscutting concepts. They call on teachers to recognizing and…

Our nation has declining participation in science and technology fields, even though in the United States we have seen an astounding collection of innovations in technology, communication, the Internet, and financial products. This lack of participation is even more noticeable for students with learning disabilities (SWLD) when compared to general…

Instructional explanations are an ubiquitous component of classroom instruction, but are relatively neglected in science education when compared to other facets of teaching and learning. The ubiquity of instructional explanations and their potential to stimulate learning in students suggests that they should garner more attention from science…

One way to bring about change in higher education is to introduce professional development programs for higher education, however these programs have been found to be ineffective at promoting positive change for individuals and departments. To address the need for better programs, I worked on two projects: one project attempts to identify a way to…

The effect of class size on student learning has numerous policy implications and has been a major subject of conversation and research for decades. Despite this, few studies have been done on class size in the context of university settings or physics courses. This dissertation helps address that gap in the literature by quantitatively analyzing…

Over the past half century, researchers and curriculum developers studying physics education have created dozens of innovative curricula and educational tools, broadly referred to as research-based instructional strategies (RBIS), to fit almost any classroom situation. However, the rate of adoption of RBIS remains relatively low. A national survey…

This study aimed to understand Malaysian physics teachers' teaching practices from a pedagogical content knowledge (PCK) perspective. The physics topic of interest was Archimedes' principle. A multiple-case study approach was used, and classroom teaching observations and audio records of teaching, interviews, and collection of documents were the…

This research is comprised of a three-part examination of equity, access, achievement, and learning in precollege physics. The first study examined teacher-level and school-level predictors of student performance in physics, with a focus on isolated teachers in New York during the 2016-17 academic year. Results indicated 40% of physics teachers…

Labs have long been considered an important component of physics education. However, while there has been progress in transforming physics education in physics lecture classes to improve student learning, less progress has been made in introductory physics labs. At the same time, the physics community has come to recognize that there is a need to…

Equitable access to advanced science coursework paired with highly qualified teachers is vital to improving the performance and persistence of students in STEM, particularly students traditionally underrepresented in related fields. This dissertation explored predictors of high school physics and chemistry teacher retention, as well as…

This dissertation is the product of several individual multi-disciplinary investigations that cover a variety of topics in mathematics, physics, geology, and geoscience education. The first chapter formulates a better understanding of the timings, magma source, and relationships between dikes and associated magmatic bodies of the Red Bluff…

As we approach the second quarter of the twenty-first century, one may predict that the environment will be among the dominant themes in the political and educational discourse. Over the past three decades, particular perspectives regarding the environment have begun to emerge: (i) realization by human beings that we not only live on earth and use…

One understudied barrier to science education reform concerns teachers' cognitive processes and how they relate to instructional decision-making. Epistemic cognition--teachers' beliefs about knowledge and knowledge acquisition and goals for their students' knowledge acquisition--could provide important insights into the choices science teachers…