This quiz drills the flags 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.
Many North America flags share colour families and symbols, which is exactly why shortlist recognition is not enough. Learn the small distinguishing details — a crest, a star count, a stripe order — and test yourself cold instead of rereading.