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1-5 of 5
Sehoya Cotner
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Journal Articles
The American Biology Teacher (2019) 81 (8): 554–560.
Published: 01 October 2019
Abstract
Recommendations for undergraduate biology education include integration of research experiences into the curriculum, regardless of major. While non-biology majors and biology majors differ in affective characteristics, it is not clear if they differ in their incoming science process skills. We created a scenario-based assessment instrument – designed to gauge science process skills – that was accessible to nonmajors and majors. We evaluated nonmajors' and majors' open-ended responses using a rubric. We also assessed students' science identity, confidence, and attitudes with a pre-course survey. While affective differences between the populations are evident, we did not detect meaningful differences in science competency. These findings indicate that nonmajors and majors are skilled in the process of science and have the ability to engage in meaningful scientific inquiry, confirming our hypothesis that, in supporting a scientifically literate citizenry, educators must emphasize teaching strategies that target affective differences between nonmajors and majors.
Journal Articles
The American Biology Teacher (2016) 78 (3): 233–240.
Published: 01 March 2016
Abstract
We describe a multiweek laboratory exercise that engages students in class-based research related to sexual reproduction, selection, orientation, and operational sex ratios. Specifically, students discuss contemporary research on sex in the bean beetle, Callosobruchus maculatus , and then develop and test hypotheses related to bean beetle sex. Working with bean beetles is inexpensive and logistically manageable, allowing instructors to scale up to large-enrollment courses. In addition, live organisms engage students in meaningful dialogue related to evolution, sex, and the process of science itself.
Journal Articles
The American Biology Teacher (2014) 76 (2): 81–87.
Published: 01 February 2014
Abstract
The evolution of complexity remains one of the most challenging topics in biology to teach effectively. We present a novel laboratory activity, modeled on a recent experimental breakthrough, in which students experimentally evolve simple multicellularity using single-celled yeast ( Saccharomyces cerevisiae ). By simply selecting for faster settling through liquid media, yeast evolve to form snowflake-shaped multicelled clusters that continue to evolve as multicellular individuals. We present core experimental and curriculum tools, including discussion topics and assessment instruments, and provide suggestions for teacher customization. Prelab and postlab assessments demonstrate that this lab effectively teaches fundamental concepts about the transition to multicellularity. Yeast strains, the student lab manual, and an introductory presentation are available free of charge.
Journal Articles
The American Biology Teacher (2014) 76 (2): 93–98.
Published: 01 February 2014
Abstract
Students regard evolutionary theory differently than science in general. Students’ reported confidence in their ability to understand science in general (e.g., posing scientific questions, interpreting tables and graphs, and understanding the content of their biology course) significantly outweighed their confidence in understanding evolution. We also show that those students with little incoming confidence in their understanding of evolution demonstrated more confidence and the most improved performance by the end of the semester. Collectively, our data indicate that regardless of prior experiences with evolution education, and in spite of myriad social challenges to teaching evolution, students can learn evolution.
Journal Articles
The American Biology Teacher (2011) 73 (4): 222–226.
Published: 01 April 2011
Abstract
We examined how college students' knowledge of evolution is associated with their self-described religious beliefs and the evolution-related content of their high school biology courses. On average, students entering college know little about evolution. Religious beliefs, the absence of evolution-related instruction in high school, and the presence of creationism-related instruction in high school were all associated with significantly lower scores on an evolution exam. We present an ordered logistic model that helps to explain (1) students' diverse views and knowledge of evolution, and (2) why college-level instruction about evolution often fails to significantly affect students' views about evolution.