Ignite your U.S. social studies curriculum with coded quotes, hidden messages, sudoku, logic matrices, and fallen phrases. Challenge your students to research to solve puzzles using deductive reasoning. Use them to introduce a unit of study, as anchoring activities, or as enrichment options. Each puzzle is based on a national social studies standard, extending the curriculum, often requiring research, and strengthening critical thinking. They are correlated to history, citizenship, geography, government, economics, world cultures, and technology. While solving the puzzles, students learn facts, content vocabulary, math, and research skills. Students stretch their brains as they are exposed to systematic thinking, critical reading skills, problem-solving skills, organizing and evaluating information, and analyzing information. Janet Aaker Smith and Sally Barber 5th - 9th