A new data set called Soil Temperature Station Data from Permafrost Regions of Russia (Selection of Five Stations), 1880s – 2000 has been published along with an educational classroom activity for K-12 students and teachers. This data set includes soil temperature data from boreholes and air temperature data located at five stations in Russia. This data set has also been incorporated into an educational classroom activity, How Permanent is Permafrost?, that helps to explore the relationship between surface air temperature and permafrost (soil) temperature. For more information and to obtain the data, see the Soil Temperature Station Data from Permafrost Regions of Russia (Selection of Five Stations), 1880s – 2000 Web page. To see the classroom activity, see the How Permanent is Permafrost? Web page.