Identifying knowledge important to teach about the nervous system in the context of secondary biology and science education–A Delphi study

Teaching about the nervous system has become a challenging task in secondary biology and science education because of the fast development in the field of neuroscience. A major challenge is to determine what content to teach. Curricula goals are often too general to guide instruction, and information about the nervous system has become overwhelming and diverse with ubiquitous relevance in society. In addition, several misconceptions and myths are circulating in educational communities causing world-wide confusion as to what content is correct. To help teachers, textbook authors, and curricula developers in this challenging landscape of knowledge, the aim of the present study is to identify the expert view on what knowledge is important for understanding the nervous system in the context of secondary biology and science education. To accomplish this, we have conducted a thematic content analysis of textbooks followed by a Delphi study of 15 experts in diverse but relevant fields. The results demonstrate six curriculum themes including gross anatomy and function, cell types and functional units, the nerve signal, connections between neurons, when nerve signals travel through networks of neurons, and plasticity in the nervous system, as well as 26 content principles organized in a coherent curriculum progression from general content to more specific content. Whereas some of the principles clarify and elaborate on traditional school biology knowledge, others add new knowledge to the curriculum. Importantly, the new framework for teaching about the nervous system presented here, meets the needs of society, as expressed by recent international policy frameworks of OECD and WHO, and it addresses common misconceptions about the brain. The study suggests an update of the biology and science curriculum.

Teaching and learning through scientific practices in the laboratory in biology education

The overall aim of this thesis is to explore challenges and opportunities with teaching and learning through scientific practices in the laboratory in biology education. This thesis is based on three articles that are introduced and discussed in an extended abstract. My focus is on practice in the laboratory, and in the thesis, I have investigated practice in two different ways. First, I have investigated upper secondary biology teachers’ practices as reported in a survey and group interview (Article I). Secondly, I have analyzed undergraduate biology students’ practices through microscale analysis of their reasoning when constructing representations in the laboratory (Article II and III). The findings from Article I show that the biology teachers’ primarily report that they implement teacher-directed laboratory work with the aim of illustrating content knowledge. The findings from Article II and III shows how different representations, such as drawings and gestures, support students’ model-based reasoning. Based on these findings, I argue for the fruitfulness of a focus on modelling through representation construction as a scientific practice in the laboratory.

Phylogenetic trees and other evolutionary diagrams in biology textbooks and their importance in secondary science education

Diagrams describing relationship between organisms, and their overall evolution, commonly in the form of phylogenetic trees or other evolutionary diagrams, have become a part of even lower secondary biology textbooks. These diagrams can help promote basic science literacy, yet their design may also strengthen misconceptions about evolution. Therefore, based on the content analysis of 112 Czech biology textbooks for secondary schools (ISCED levels 2 and 3), characteristics of introduced phylogenetic trees and other evolutionary diagrams were recorded and evaluated according to the cladistics to see if their construction supports the current scientific understanding of evolution. The content analysis indicates that the design of nearly half of all diagrams in current lower (ISCED 2) and upper secondary (ISCED 3) textbooks promotes ladder thinking. More than 80% of all diagrams were not accompanied by instructions on how to read them, meaning that students did not have sufficient scaffolding to understand them. Mainly ISCED 3 textbooks did not introduce additional problem tasks that would support the use of the diagrams in the lessons. Therefore, authors of textbooks should focus more on the construction quality of these diagrams while also supporting their correct application during the educational process. This is likely to prevent a further increase in student misconceptions.

Using Pulse Oximetry to Illustrate Homeostasis in the Secondary Biology Laboratory

To survive, complex organisms must maintain homeostasis by coordinating the activity of interacting, hierarchical systems. This is a core biological idea in the Next Generation Science Standards and one that many students find challenging. The most common lab exercise used to introduce homeostasis – a mini-experiment in which students measure how physical activity affects their pulse and respiratory rate – fails to show any direct evidence of internal stability. In this article, we describe how modifying this lab using an inexpensive pulse oximeter rectifies this shortcoming, giving students the ability to collect laboratory data that show both change and dynamic stability.

gPortfolios: a pragmatic approach to online asynchronous assignments

Purpose The purpose of this paper is sharing out basic guidelines and examples from an extended collaboration to move educators move online while avoiding synchronous meetings. “gPortfolios” are public (to the class) pages where students write responses to carefully constructed engagement routines. Students then discuss their work with instructors and peers in threaded comments. gPortfolios usually include engagement reflections, formative self-assessments and automated quizzes. These assessments support and document learning while avoiding instructor “burnout” from grading. gPortfolios can be implemented using Google Docs and Forms or any learning management system. Design/methodology/approach The authors report practical insights gained from design-based implementation research. This research explored the late Randi Engle’s principles for productive disciplinary engagement and expansive framing. Engle used current theories of learning to foster student discussions that were both authentic to the academic discipline at hand and productive for learning. This research also used new approaches to assessment to support Engle’s principles. This resulted in a comprehensive approach to online instruction and assessment that is effective and efficient for both students and teachers. Findings The approach “frames” (i.e. contextualizes) online engagement using each learners’ own experiences, perspectives and goals. Writing this revealed how this was different in different courses. Secondary biology students framed each assignment independently. Secondary English and history students framed assignments as elements of a personalized capstone presentation; the history students further used a self-selected “historical theme.” Graduate students framed each assignment in an educational assessment course using a real or imagined curricular aim and context. Originality/value Engle’s ideas have yet to be widely taken up in online education.