Philosophical Investigations

Learning the meaning of a new word is different than knowing its definition. Ludwig Wittgenstein's Philosophical Investigations discusses the importance of context in understanding a word's meaning, as well as the fluidity of...

Why does communication between people go wrong? According to Ludwig Wittgenstein, it's because the words we use make pictures in our minds but do not create the same picture in the minds of our listeners. Introduce young philosophers to...

In this online interactive philosophy worksheet, students respond to 30 multiple choice questions about Philosophical Investigations by Ludwig Wittgenstein. Students may submit their answers to be scored.

Audio of the BBC Radio 4 program "In Our Time." This forty-three minute episode discusses Ludwig Wittgenstein. Experts discuss his life, his work, and his impact on philosophy. Listening requires RealPlayer.

The life and work of philosopher Karl Marx is surveyed with links to full-text translations of The Communist Manifesto and other tracts.

In this online interactive history worksheet, students respond to 10 short answer and essay questions about Tractatus Logico-philosophicus. Students may check some of their answers on the interactive worksheet. 

Consider one of the most fundamental questions of philosophy posed by Rene Descartes in his Meditations on First Philosophy: How do we really know we exist? This animated video is accompanied by multiple-choice assessment questions,...

In this online interactive philosophy quiz activity, students respond to 20 multiple choice questions about Ludwig Wittgenstein's Tractatus Logico-philosophicus. Students may submit their answers to be scored.

In this online interactive philosophy worksheet, students respond to  short answer and essay questions relating to presocratics.

In this online interactive philosophy worksheet, students respond to 30 multiple choice questions about Blue and Brown Books by Ludwig Wittgenstein.