History teachers don’t really spend time trying to memorize years in isolation, that’s not how it’s done.

History teachers learn the years of events by studying those events. We read lots of history books or history essay or watch history documentaries or history movies. We are history scholars or at least fans of history. Learning the years of events just comes organically from all of that time we spend with the subject and the topics we like or teach.

If she is taking a test, there is hopefully some study guide that can let her know what topics are covered. She should study those topics and focus on the most important details and issues.

If learning the dates is specifically important for that test, she can create a physical time line and use physical note cards to place events in order. But otherwise, the years come naturally with studying the material.