I browsed through the Viking-related questions, but didn't find anything particularly useful (maybe I just didn't look hard enough).
I'm interested in online and fairly accessible (read: short) primary sources of the Viking invasions, raids, and commerce from Vikings' perspective. Anything that documents their travels (though I'm not especially interested in the New World), their settlements, their combat, and/or their social life. I know we have plenty of their sagas, but I'm having trouble finding a collection of them that is focused enough to be useful for an in-class exercise. Any suggestions?
So the problem with the "from the Viking's perspective" part is that they were pre-literate during much if what we call the "Viking Age" (c.800-c. 1050). All of the sources from this time period are thus written by Anglo-Saxons, Franks, Arabs, etc. The sagas and later stuff are all pretty far removed from the period of most activity.
For documents from this period, you can check out Viking Sources in Translation for an online source-book.
There are a few documents which may be especially useful to you:
The Account of Ohthere and Wulfstan is an interesting source. It comes from an Anglo-Saxon translation of Orosius' Historiae Adversus Paganos but the Anglo-Saxion "author" added two brief accounts by two Norse captains about their voyages. They are short and they are probably the closest we have to an actual first person account.
The Vita Anskarii is a saint's life of the so-called Apostle to the North, Anskar, written shortly after his death by his pupil Rimbert. It is super Christian and long and boring for the most part But there are a few interesting tidbits in there about life in Scandinavia. See esp. chapters 10, 19, 27, and 30. Anyway a quick skim might locate some stuff for your students.
The Rök Stone is an actual viking "document" and you might be able with a bit of searching to find more rune stone transcriptions online.
In terms of sagas and later work someone else can hopefully answer that, as they fall outside of my time period and I don't have them immediately off my head. I'll think a bit more and see if I can find/think of anything useful.
There are several possibilities; many translated sources are available here. Unfortunately, it does not include famous hagiographic reports (such as the Frankish Life of St. Philibert), which often make for the most vivid descriptions (more vivid, at least, than the dry annalistic style of St-Bertin or the ASC). For an introduction to the problems we have with the source material, any description of over-the-top violence by horrified churchmen can do (Alcuin's letter about Lindisfarne is a classic, but it is also kind of boring). For more original choices, you may be interested by Abbasid sources (esp. Ahmad ibn Fadlan); since they describe events in “eastern Europe,” they give a good sense of how far-reaching Viking incursions were, and are probably our best primary description of the relation between commerce and war.
/e sorry, I overlooked the idea of a “Viking perspective”. In this case /u/Mediaevumed summarizes nicely the most exploitable sources we have.
I cant find it online I'm afraid, but The Viking Age: A Reader, by Andrew McDonald and Angus A. Somerville is an excellent collection that comprises several of the sources mentioned elsewhere in this thread, depictions of runestones and short saga extracts, organised thematically. Its on google books, though the preview function dosent appear to be working for me, but it's definetly the best viking primary source collection I know of.