Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.07.02.184077v1?rss=1 Authors: MacFadden, B. J., Pirlo, J., Abramowitz, B., Killingsworth, S., Ziegler, M. Abstract: The extensive sedimentary sequence of Florida preserves evidence of prehistoric life spanning some 40 million years into the past. This paper describes the results of a three-pronged professional development (PD) program conducted in November 2019 in which Florida teachers from eight counties gained knowledge and experience about the process and content of paleontology at an active field research site in northern Florida. Working alongside scientists, 15 elementary, middle, and high school teachers collected 5-million-year-old fossil vertebrates and made scientifically important discoveries that advance understanding of Floridas prehistoric life. The PD included three components: (1) a pre-trip webinar; (2) a morning tour of our museum exhibits to scaffold teachers understanding of the kinds of fossils they would find; and (3) the actual day-long field experience collecting fossils. A post-PD evaluation revealed gains in knowledge about, and experience with, fossils and paleontology. We also found that overall satisfaction with the PD underscored the importance of each of the three components supporting one-another--resulting in a more informative and rewarding learning experience for the participants. Fossils and the science of paleontology are a gateway for STEM learning and this subject and its extensions are applicable to existing standards in earth and life sciences at many grade levels. Copy rights belong to original authors. Visit the link for more info