This applied dissertation was designed to determine if there is a difference between students' gender, ethnicity, and age and their performance in General Chemistry I at a Christian University in Florida. Many scientific studies reveal the existence of a gender performance gap in chemistry: women mostly underperform men. Certain factors reported…

The effect of PowerPoint Presentation-based (PPPb) quiz to the students' scores has been rarely studied. It is the intention of this research to understand the effect of PPPb quiz to students score in wave motion and the students' experiences under such a strategy. This research used a mixed approach: quasi-experimental to learn if scores gain was…

Scientific literacy is the ability which must be owned by the students to analyze and apply the concept of science in solving daily life problem. This research aims to know the correlation between scientific literacy and science learning achievement at State Junior High Schools. This research used a quantitative approach with correlational type.…

We discuss an investigation of the difficulties that students in a calculus-based university introductory physics course have with electric field and the superposition principle for the case of a continuous charge distribution and how that research was used as a guide in the development, validation, and evaluation of a tutorial on these topics to…

The structure and definition of professional knowledge is a continuing focus of science education research. In 2012, a pedagogical content knowledge (PCK) summit was held and it suggested a model of professional knowledge and skill including PCK, which was later often called the Consensus Model (Gess-Newsome, 2015. A model of teacher professional…

In this exploratory study, we attempted to measure potential changes in teacher knowledge and practice as a result of an intervention, as well as trace such changes through a theoretical path of influence that could inform a model of teacher professional knowledge. We created an instrument to measure pedagogical content knowledge (PCK), studied…

There is a significant concern about students' achievement in reading comprehension. The study examined the reliability, validity, and slope of curriculum based measures in a content specific area -- science. Participants included students in 6th grade science classes. The curriculum based measures (CBM) being used consisted of vocabulary-matching…

Following professional development (PD), implementation of contemporary topics into high school biology requires teachers to make critical decisions regarding integration of novel content into existing course scope and sequence. Often exciting topics, such as neuroscience, do not perfectly align with standards. Despite commitment to enacting what…

The purpose of this study was to investigate gender differences in Omani 10th-grade students' perception of their science teachers' Pedagogical Content Knowledge (PCK) in both realities and as they desired. Two versions of electronic questionnaires consisting of sixteen main items were designed to achieve the aims of this study. These two versions…

As elementary schools across the U.S. continue to adopt new science education reform, attention is needed to understand how teachers make sense of using engineering design to teach science in their classroom settings. This study examined fourth-grade teachers' sense-making with learning to integrate engineering design-based science instruction and…

Informal learning organizations such as museums, zoos, aquaria, gardens, and community-based organizations are often positioned as having programming that fill a void that may exist in the lives of youth participants. Often these institutions do not recognize the assets that youth gain from their own homes and communities and bring to bear in…

The main aim of this research is to examine the effect of an instructional design based on the Algo-Heuristic Theory of Instruction (AHTI) on students' mathematics performance and logical thinking skills in the subject of 7th grade mathematics. The research is grounded in a mixed method. In the quantitative part of the research, a…

Access and performance in advanced high school physics have been persistently inequitable when considering student ethnicity and gender. This quasiexperimental, observational study examined access and performance of students in four Advanced Placement (AP) Physics courses in 2018-2019: AP Physics 1 (N = 150 451), AP Physics 2 (N = 20 466), AP…

The rapid shift from face-to-face to remote instruction in 2020 has resulted in recalibration of lecture and laboratory pedagogy. This research analyzed the impact of remote learning on student motivation and sense of belonging in large enrollment chemistry courses. Student responses were parsed according to specific demographics including gender,…

There has been increasing interest in exploring heterogeneous treatment effects using machine learning (ML) methods such as causal forests, Bayesian additive regression trees, and targeted maximum likelihood estimation. However, there is little work on applying these methods to estimate treatment effects in latent classes defined by…