I used it to create the teaching materials for EDINA's MapStream service.
As a GIS package, this is capable of carrying out most of the same tasks as a package like ArcGIS.
It is also capable of acting as the host programme to run a WMS (web mapping service)
A WMS which you may be interested in Edina's MapStream - I have blogged about it previously (and recently) because of my involvement in creating the teaching resources.
While blogging this I remembered, and hunted out a set of resources for use with QGIS, which I got in 2008ish.
They were produced by the British Antarctic Survey, and provided a range of activities for exploring the South Pole and surrounding areas. They came in a spiral bound folder complete with various paper maps of the continent. I shall see where I might be able to fit some of those into my teaching.
A new set of materials created by Ian Allen @LearnPracGIS can be accessed HERE.
You can sign up for a free course. A Quantum GIS for Newbies eCourse.
Follow the link on the right hand side of Ian's page.