Compare daily life today with daily life during a parent's or grandparent's childhood.
Daily life has changed a lot over time. The way people talked to friends, watched shows, traveled, and did schoolwork used to look very different than it does now.
Comparing "then" and "now" helps you see change clearly. Some things changed a lot, like phones. Other things barely changed at all, like eating breakfast before school.
Mastery looks like: They can name real, specific differences and similarities between daily life today and daily life in an earlier generation.
Common stumbles: Assuming everything was completely different long ago, or that "now" is automatically better in every way.