To do on your own: Open source 1 and read through on your own for a couple of minutes (especially the abstract) - you won't be able to read the whole source, but you can get an idea of what the source is about, and think about what evidence the author used. Use Google if you need help finding out more about the article. Notice the structure of the article and any characteristics about the article that you want to discuss with your group.
Talk with your group about the following:
1. What kind of source is this? What clues helped you decide this?
2. Why would you use a source of this type or like this one for your research?
Then we'll talk about it as a class.