This is essentially a keynote memory game I created for my 6th graders to learn the different states, countries and continents of the world. I was blown away by how effective it was, and how much fun the kids actually had playing it. We even had in-class and cross-team geography bee's based on it.
This particular one is the countries of South America. The different countries light up at the click of the mouse, (or tap of the space bar), followed by the correct name of the country. Students try to see how far they can get based on their knowledge of South American geography.