A Ticket out the Door is just a short assignment such as a paragraph about something taught during that class period. Students have to turn it in order to leave. This allows a basic assessment of where kids are while not being as formal as a quiz or similar thing. If concept is chosen wisely it could also be a way to connect with students, such as asking how the days topic could affect their lives or how they see it being used in the future.
In cases where a formal assessment might be overkill, a “ticket out the door” could be more useful.
Ticket Out the Door: Why should we build large dams?
Write a one sentence geographic argument for building big dams and a one sentence geographic argument against building big dams that are central to understanding how or why humans modify the environment.