The definition of 'primary source' does differ in the Humanities, Social Sciences, and Natural and Applied Sciences. The UBC Library offer clear definitions of primary and secondary sources.
The Faculty of History at the University of Cambridge offers a virtual classroom that includes, for example, Reading Primary Sources, How to use Historical Sources, and Where do Historical Sources come from?.
Look up any unfamiliar words, names, or people using the following resources:
Your professor has recommended the following sites if you want to have a little fun.