Teaching science as a language: A “content‐first” approach to science teaching

Our research project was guided by the assumption that students who learn to understand phenomena in everyday terms prior to being taught scientific language will develop improved understanding of new concepts. We used web‐based software to teach students using a “content‐first” approach that allowed students to transition from everyday understanding of phenomena to the use of scientific language. This study involved 49 minority students who were randomly assigned into two groups for analysis: a treatment group (taught with everyday language prior to using scientific language) and a control group (taught with scientific language). Using a pre–post‐test control group design, we assessed students' conceptual and linguistic understanding of photosynthesis. The results of this study indicated that students taught with the “content‐first” approach developed significantly improved understanding when compared to students taught in traditional ways. © 2008 Wiley Periodicals, Inc. J Res Sci Teach 45: 529–553, 2008     

Science instruction for the mildly handicapped: Direct instruction versus discovery teaching

The authors' purpose in this study was to compare the effectiveness of two instructional approaches on mildly handicapped and nonhandicapped students' science achievement. Students were assigned at random to one of two conditions: (a) direct instruction, and (b) discovery teaching. The content of the lessons remained constant across conditions and focused on such concepts as displacement, flotation, variable, controlled experimentation, and scientific prediction. The results show that students in both groups learned equally well as measured by an immediate posttest. However, students in the discovery teaching condition outperformed their direct instruction counterparts on a retention test administered two weeks after the posttest. Finally, learning-disabled students in the discovery condition performed better than their direct-instruction counterparts on a performance-based measure designed to assess generalization. Implications for research and for practice are discussed.     

Development of an Evaluation Tool for Online Food Safety Training Programs

Abstract: The objective of this study was to provide the person in charge and food safety instructors an assessment tool to help characterize, identify strengths and weaknesses, determine the completeness of the knowledge gained by the employee, and evaluate the level of content presentation and usability of current retail food safety training platforms. An existing evaluation tool was modified to assess online food safety training programs that contained 5 areas of emphasis: content and instruction, learners, job transfer, design and packaging, and operation. Participation included watching 3 food safety training modules and afterwards evaluate what degree the module content met objectives. More than 85% of the participants responded positively to the scale‐based items of the course evaluation. Items addressing the content and instruction received positive responses. The assessment tool helped panelists to objectively evaluate an online food safety training program that provided numeric data for a valid comparison.