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1. Classroom Resources | Grades   5 – 12  |  Calendar Activity  |  October 28
   Dr. Jonas Salk, who developed the polio vaccine, was born in 1914.
   After learning about Dr. Salk, students interview a family member or someone they know who remembers the polio epidemic.
2. Classroom Resources | Grades   7 – 12  |  Calendar Activity  |  June 10
   The Crystal Palace hosted the first display of life-size dinosaur replicas in 1854.
   After learning about Hawkins' dinosaur replicas, students work individually or in small groups to investigate a dinosaur of their choice, comparing their findings to Hawkins'.
3. Classroom Resources | Grades   5 – 12  |  Calendar Activity  |  August 7
   The first picture of Earth was taken by the U.S. satellite Explorer VI in 1959.
   After students view the first picture from the Explorer VI Satellite, they discuss the differences between this first image and the images of the earth that we typically see today.
4. Classroom Resources | Grades   5 – 12  |  Calendar Activity  |  July 10
   The Scopes Trial began today in 1925.
   Students brainstorm a list of objects and processes that have changed over time and use the Timeline tool to sketch out the evolution of the item they have chosen. A giant class timeline can be created to show the evolution of the items students have investigated.