This lesson plan addresses the Essential Question: How has lower Manhattan changed over time, with a focus on the eventual creation of the Twin Towers. It was created by the 9/11 Museum, and its main focus is the Twin Towers. It analyzed New Amsterdam, the creation of NYC, and then the creation of the Twin Towers. It uses primary sources to show the Twin Towers and their relationship with New Amsterdam.

This lesson plan addresses the Essential Question: What are ways that people memorialized the 9/11 attacks? It addressing a difficult topic like 9/11 and memorialization of historical events for elementary aged students.