Stanford University
Stanford Encyclopedia of Philosophy: Gottlob Frege
Good summary of Frege's thought. Some sections are more technical, but the explanation of his philosophy of language and other sections are more readable.
Stanford University
Informal Logic/stanford Encyclopedia of Philosophy
Describes the recent movement known as "informal logic." Summarizes its brief history, provides several detailed examples, and explains its relationship to philosophy. Bibliography included.
University of St. Andrews (UK)
University of St. Andrews: Friedrich Ludwig Gottlob Frege
Great summary of Frege's philosophical significance in terms that anyone can understand. Includes links to his works and several illustrative quotes. A great place to start. Includes links to related philosophers and logical topics.
University of Cambridge
University of Cambridge: Nrich: Game: Tandem
Sharpen your problem solving and strategy skills playing this game. There is a "printable page" link if you want to print it out to help you work with the problem.