Students' reasoning about chemical bonding: The lacuna of repulsion

This article concerns a lacuna in chemistry students' reasoning about chemical bonding. Although chemistry students are familiar with the charges that make up the atom––both positive and negative––they refer only to the attraction between unlike charges. Specifically, they ignore the repulsion between the positive nuclei. We named this disregard of repulsion the lacuna of repulsion. Repulsion is a crucial component in the force-based explanation of chemical bonding, presenting the bond as a dynamic equilibrium between attraction and repulsion electrical forces. We noticed this lacuna incidentally while interviewing chemistry students for a bigger project aimed at supporting students in understanding the force-based explanation of chemical bonding. This article describes our systematic qualitative study of the lacuna of repulsion and its impact on mental models of 23 high school chemistry students. Our findings show that students use six mental models, most of them built upon each other. Beginning from a simple mental model that describes the chemical bond as electrons, continuing with the including attraction forces, and completing with repulsion and a dynamic view of the bond. Only when one considers both attraction and repulsion forces and understands the dynamic balance between them is it possible to build the force-based dynamic mental model of chemical bonding.     

Socio-scientific reasoning and environmental literacy in a field-based ecology class

The complex environmental challenges humanity faces require citizens who are scientifically and environmentally literate. Many environmental education programs are situated in the field where students are immersed in their learning. These field-based activities are engaging but may lack opportunities for students to develop critical thinking and reasoning skills necessary to be environmentally literate. We suggest a socio-scientific issue (SSI) based teaching approach can increase epistemic engagement and lead to student gains in scientific and environmental literacy. This study describes how we modified an existing field-based ecology course, framing the learning around a local environmental socio-scientific issue. We used a convergent parallel mixed-methods approach to examine the changes in socio-scientific reasoning (SSR) over time for high school students in this course as a measure of scientific and environmental literacy. Results indicate that a focused SSI field-based environmental education curriculum can support development of socio-scientific reasoning and environmental literacy competencies among high school students.     

Transitioning from practicing teacher to teacher leader: a case study

Given US students’ lack of international competitiveness in mathematics and science, many states have adopted the Common Core State Standards for Mathematics (CCSSM). To help ensure that the Standards for Mathematical Practice within the CCSSM and effective teaching practices are implemented appropriately, many teachers are emerging as teacher leaders with the intent of supporting teachers with this implementation. Unfortunately, not all of these teachers are necessarily prepared in the field of teacher leadership. Recognizing the importance of having well-prepared teacher leaders, this article describes the case of Ms. Hodges, as she transitioned from mathematics teacher to teacher leader. Data revealed that several factors affected Ms. Hodges’ transition, some positively and others negatively. These results as well as implications for teacher leader development are provided.     

Instructor Humor as a Moderator of Instructors’ Inappropriate Conversations and Instructional Dissent

This study (N?=?326) was conducted to examine the associations among instructor humor, inappropriate conversations, and instructional dissent. First, results showed students are more likely to employ rhetorical dissent when they perceive their instructors as humorous in the classroom. Second, using expectancy violations theory as a guide, results also indicated that students’ perceptions of instructor-relevant humor moderated the relationships between enactment of inappropriate conversations and students’ expressive and vengeful dissent. These findings support the importance of employing relevant humor in course instruction, especially when instructors engage in inappropriate conversations in the college classroom.     

Towards a truer multicultural science education: how whiteness impacts science education

Cultural Studies of Science Education - The hope for multicultural, culturally competent, and diverse perspectives in science education falls short if theoretical considerations of whiteness are...     

Transforming Education through School-community Partnerships: Lessons from Four Rural Early Childhood Development Schools in Zimbabwe

This article presents and discusses the findings of a multi-case study that was conducted in four remote rural early childhood development (ECD) schools located in the Chiredzi district, in Masvingo province, Zimbabwe. The article explored how school heads enhanced resources mobilisation in remote rural ECD schools through school-community partnerships in order to improve teaching and learning conditions. Semi-structured interviews were conducted with the school heads, deputy heads and teachers in charge. Document reviews and observations were also used to augment data from interviews. Invitational leadership was used as an analytic tool for the study. The findings suggest that the school heads succeeded to some degree in bringing parents and various stakeholders to the ECD schools to deal with the challenges facing them. Various strategies were used including tapping into local knowledge to ensure that parents who could afford to pay fees managed to do so.     

Understanding the Use of Student-Centered Teaching Methods in Undergraduate Chemistry Courses

A growing body of research suggests that student-centered teaching methods are associated with positive learning outcomes for undergraduate students. Yet, the extent of their use and factors leading to their adoption in fields, such as chemistry, continue to be under-explored. Utilizing survey data collected during 2015, we begin to fill this gap, first by considering the degree to which faculty and instructors use and plan to use various student-centered teaching methods in their undergraduate chemistry courses. Then, we examine three potential factors that may help us understand variation in (1) use of and (2) intentions to implement student-centered methods: attitudes toward teaching methods; teaching approaches; and institutional characteristics. Importantly, our findings suggest attitudes and individual teaching approaches are significant predictors of the use and intention to implement student-centered methods in the classroom. Perhaps surprisingly, several institutional factors examined (such as class size, percentage of time spent teaching, and type of institution) play no significant role. Given the positive student outcomes associated with various student-centered methods reported in literature, these findings suggest potential avenues for faculty and instructors’ professional development toward further implementation of these methods.

     

The personal tutor–student relationship: student expectations and experiences of personal tutoring in higher education

The personal tutor plays a key role in the student experience at university, and personal tutoring embodies the student relationship with the university, suggesting that it has the potential to provide insights beyond that specific relationship to the institution and higher education context. A focus session with first year undergraduate students explored expectations and experiences of personal tutoring from the student perspective. Interpretative phenomenological analysis was used to explore students’ lived experiences, and identified superordinate themes of expectations, experiences and relationships, with cluster themes including independence and authenticity. Developing a positive and genuine relationship with the personal tutor was found to ‘buffer’ against some of the first year challenges and contribute towards a sense of belonging. Importantly, this study provides evidence that experiencing poor personal tutoring is worse than not having a personal tutor at all, as this can lead to students experiencing strong negative emotions and re-evaluating their decision to go to university. Implications of these findings in the current higher education context of fee-paying students and competing institutional demands are discussed.