In this tour of the world puzzle, students read a map and determine a travel itinerary based upon given criteria. They are required to visit 23 cities.  This one-page instructional activity contains one puzzle.  The answer...

Use the age-old Traveling Salesman Problem to introduce Hamilton circuits to your young travelers. Individuals then plan an efficient route to visit all the places they want to go.

A collection of interactive visualizations that were produced through analysis of economic, political, and market research data. Topics are diverse, e.g., military spending and trade, immigration, consumer spending, crime, unemployment,...