Critical Thinking
   Teaches how to identify and evaluate study designs and determine whether a question can be explored scientifically.
   http://www.psych.ualberta.ca/~ITL/ct/

Internal Validity Tutorial
   Gives examples of threats to validity then challanges students to identify problems with hypothetical studies.
   http://psych.athabascau.ca/html/Validity/

Methods in Behavioral Research
   Directory of online resources relating to each chapter of a textbook. Also includes practice quizzes.
   http://methods.fullerton.edu/

Psychological Image Collection at Stirling (PICS)
   Stimuli available for free download. Includes faces, objects, drawings, textures, and natural scenes.
   http://pics.psych.stir.ac.uk/

Research Design Explained
   Instructor’s site for a textbook which has lectures, handouts, and activity ideas. Linked student site has self-tests, concept maps, and tutorials.
   http://psy1.clarion.edu/mm/teachRDE/start/default.html

Research Methods
   Online tutorial gives examples, practice, and a test to assist students in understanding the differences between experimental, correlational, survey, and other methods.
   http://www.mcli.dist.maricopa.edu/proj/res_meth/

Wextor
   Tool to help generate web pages for multi-condition (between and/or within subjects) experiments. Requires registration.
   http://psych-wextor.unizh.ch/wextor/en/