Other
Perspective.com: The Fungus Kingdom
Fungi have a variety of roles in nature, including decomposers and parasites. This website from Perspective.com includes additional information on the Fungus Kingdom, and a breakdown of related phylums and classes.
Wikimedia
Wikipedia: Binomial Nomenclature
Wikipedia, an open-source encyclopedia, offers great information on the classification system used in Biology. Covers the benefits of the system, history, and general information on the whole system together.