This link is a great tool to get an overview of some important explorers in American History. This website gives the name of the explorer, year of expedition, and an quick statement about the expedition. The timeline starts from the 1400s to the 1500s. This is a great website for teachers to get an overview and refresh their knowledge of the explorers. They can turn this into a timeline project for their students and find creative ways to teach each explorer.
Timeline of Explorers in American History