This quiz drills the capital cities of North America including Central America and the Caribbean. Instead of one giant worldwide round, you focus on a single region at a time — which is far more effective when you are trying to actually remember a set of countries rather than guess at random.
Capitals are the fastest geography win: most North America capitals are also the largest or most historically important city, so each answer anchors a country in your memory. Practise in short daily bursts rather than one long session — spaced recall is what makes them stick.