Logic

Logic - A Workbook: http://www.kpaprzycka.filozofia.uw.edu.pl/Publ/xLogicSelfTaught.html

Logic Riddles: http://bogglesworldesl.com/teaching_article2.htm
Logic Puzzle explanation: www.puzzles-on-line-niche.com/Kids-logic-puzzles-tutorial.html

Identify the logical fallacies: http://web.cn.edu/kwheeler/Logic_Fallacies_Exercise.html