The AtoZ Map Library is a comprehensive database containing over 94,000 royalty-free maps that can be used freely for non-commercial purposes. It includes modern maps of the world, regions, countries, US states as well as antique maps, scientific maps from sources like NASA and NOAA, topographic maps from the USGS, thematic maps on topics like earthquakes and climate change, and extensive teaching tools like lesson plans, puzzles and glossaries. The maps can be accessed through a library subscription and are optimized for classroom and student use, with ongoing updates and hosting provided.