No abstract

This paper reports an investigation of mathematical resources available on the social media site Pinterest. Pinterest is an online bulletin board where users create visual bookmarks called pins in order to share digital content (e.g., webpages, images, videos). Although recent surveys have shown that Pinterest is a popular reference for teachers, understanding of the mathematical resources available on the site is lacking. To take initial steps in investigating the curriculum resources provided by Pinterest, we used keyword searches to gather a database of pins related to the topic of negative integers. A content analysis was conducted on the pins with a focus on several characteristics including mathematical operations, mathematical models, use of real-world context, and whether mathematical errors were present in source material. Results show a dominance of addition and subtraction over other operations, use of mathematical models in half of pins, infrequent use of real-world context, and mathematical errors in roughly one-third of pins. We provide a breakdown of these results and discuss implications of the findings for mathematics teacher education and professional development.

First successfully described in 1967, acute respiratory distress syndrome has since garnered much interest and debate. Extensive studies and clinical trials have been carried out in efforts to address the associated high mortality; however, it remains a significant burden on health care. Despite the heterogeneous etiologies that lead to the development of acute respiratory distress syndrome, this rapidly progressing form of respiratory failure, characterized by severe hypoxemia and nonhydrostatic pulmonary edema, has a recognizable pattern of lung injury. In this chapter, we will review the clinical manifestations, definitions, causes, and a brief overview of the pathophysiology of this complex syndrome.