NEWLY UPDATED 2018!This unit provides an introduction to call numbers which focuses on how call numbers are created, how they are used, and why they are used. Even as many of us move to “genrefying” our collections, there still must be order in those sections. Additionally, as long as we have print materials in our Media Centers and school libraries, students need to understand the call number system and the specific sections which define them. I typically complete this unit before working o