Mission: Critical  
   Interactive tutorial for critical thinking.
   http://www.sjsu.edu/depts/itl/

The Daily Translation  
   Problems on translation into a logical system, drawn from the current news and updated daily.
   http://www.univnorthco.edu/philosophy/trans.html

Stephen Downes : Fallacies  
   Stephen's Guide to the Logical Fallacies.
   http://www.intrepidsoftware.com/fallacy/welcome.htm

Core Concepts in Critical Thinking  
   A classroom guide.
   http://www.kcmetro.cc.mo.us/longview/ctac/corenotes.htm

Logic Software from CSLI  
   Hyperproof, Tarski's World, Turing's World, and The Language of First-order Logic, educational logic software by Jon Barwise and John Etchemendy
   http://www-csli.stanford.edu/hp/

Games Mathematicians Play  
   Mathematical games from a logical point of view: strategies for games and using games in descriptive complexity.
   http://www.math.usf.edu/~mccolm/RGintro.html

Infinity  
   Exploring the logical basis and practical meaning of infinite sets.
   http://www.c-parr.freeserve.co.uk/hcp/infinity.htm

University of Alberta Logic Course  
   Contains an introduction to logic and formal systems, revolving around the Mizar proof checker, and a guide to Mizar.
   http://ugweb.cs.ualberta.ca/~c272/

The Logic Classroom  
   A course in basic logic consisting of 5 studies with exercises and answers to promote the learning of logic. Homeschool, college, and seminary students.
   http://www.sjsu.edu/faculty/carranza

Around Gödel's Theorem  
   (Hyper)textbook for students in mathematical logic, by Karlis Podnieks.
   http://www.ltn.lv/~podnieks/

Gödel's Theorem and Information  
   G.J.Chaitin's proof of Gödel's theorem using arguments having an algorithmic information theory flavor.
   http://www.cs.auckland.ac.nz/CDMTCS/chaitin/georgia.html

The Logic Daemon  
   On-line proof checker, and texts.
   http://logic.tamu.edu/

Logic for Mathematics and Computer Science  
   Supplementary material to Stanley Burris' logic textbook, with lecture notes, course development hints, and additional text including historical notes.
   http://thoralf.uwaterloo.ca/htdocs/lmcs.html

Formal Methods Educational Materials  
   A repository for information related to formal methods in education, including pointers to existing courses and suggestions for examples and projects.
   http://www.cs.indiana.edu/formal-methods-education/

logic-l  
   Elementary Logic Discussion List.
   http://www.liszt.com/lists/logic-l/

Course on Description Logics  
   Slides and notes by Enrico Franconi.
   http://www.cs.man.ac.uk/~franconi/dl/course/

OBBLOG  
   Logic construction toybox. Binary logic simulator to explain binary logic and truth tables. Javascript.
   http://www.geocities.com/nummolt/obblog/

Logic Tutorial  
   An interactive tool teaching basic formal logic, rendering truth tables as clickable Johnston diagrams. With notes on the Buddhist Nagarjuna and modern symbolic logic.
   http://logictutorial.com/

ASL Committee on Logic Education  
   Reports and resources from the Association of Symbolic Logic.
   http://www.phil.ucalgary.ca/asl-cle/

The Logic Cafe  
   An online textbook, courseware package, and homework assistant for introductory symbolic logic. Includes multimedia support.
   http://www.oakland.edu/phil/cafe/

Disjunction  
   Theory and history of the binary connective 'or'; from the Stanford Encyclopdia of Philosophy by Ray Jennings.
   http://plato.stanford.edu/entries/disjunction/

Language Proof and Logic Solutions  
   Educational resource for users of the Language Proof and Logic textbook.
   http://www.geocities.com/lplsolutions/

A Problem Course in Mathematical Logic; by Stefan Bilaniuk  
   Volume I: Propositional and First-Order Logic. Volume II: Computability and Incompleteness.
   http://euclid.trentu.ca/math/sb/pcml/