The International Open Source Network (IOSN) has just released a primer on Free/Open Source Software (FOSS) in education. The document highlights uses of open source software in the infrastructure, administration, and classroom work of schools, focusing on a number of high-profile projects such as the Linux Terminal Server Project (LTSP), OpenOffice.org, Koha, Moodle, MIT’s OpenCourseWare, and Wikipedia. Low cost isn’t the only reason to move toward open source software, and this document does an excellent job of providing important information to school leaders who want to learn more.