Authentic Research Experience and “Big Data” Analysis in the Classroom: Maize Response to Abiotic Stress

Integration of inquiry-based approaches into curriculum is transforming the way science is taught and studied in undergraduate classrooms. Incorporating quantitative reasoning and mathematical skills into authentic biology undergraduate research projects has been shown to benefit students in developing various skills necessary for future scientists and to attract students to science, technology, engineering, and mathematics disciplines. While large-scale data analysis became an essential part of modern biological research, students have few opportunities to engage in analysis of large biological data sets. RNA-seq analysis, a tool that allows precise measurement of the level of gene expression for all genes in a genome, revolutionized molecular biology and provides ample opportunities for engaging students in authentic research. We developed, implemented, and assessed a series of authentic research laboratory exercises incorporating a large data RNA-seq analysis into an introductory undergraduate classroom. Our laboratory series is focused on analyzing gene expression changes in response to abiotic stress in maize seedlings; however, it could be easily adapted to the analysis of any other biological system with available RNA-seq data. Objective and subjective assessment of student learning demonstrated gains in understanding important biological concepts and in skills related to the process of science.     

An Ongoing Professional Development Program and Its Impact on Teacher Effectiveness

Professional development (PD) has been identified as a critical mechanism that helps teachers increase students' achievement. However, the content and form of this mechanism varies widely. This study examines an ongoing PD for school teachers, which has been explicitly founded on a set of guiding principles associated with quality professional development. The effects of participation in this program on three domains of teacher effectiveness, measured through classroom observations, are tested in a sample of 153 teachers. The domains of teacher effectiveness are planning and preparation, classroom environment, and instruction. Regression results indicate that participation in this program is significantly related to teachers' scores on instruction only. The implications of this finding indicate that high-quality professional development does not always address all domains of teaching. Other implications derived from the findings point to the need for professional development opportunities to be ongoing and highly focused on improving inquiry-based instruction.