To review and pre-teach content material, this fun and engaging 100th Day of School activity is a great way to get students interested in the major historical events of the last 100 years. To begin the activity, the teacher will either write on the whiteboard or announce that today the class is going to assume the role of Historical Investigators, revealing the most exciting events in history over the last 100 years. The teacher will then group the students into groups of 2-4 based on the class size. The teacher will pass out the investigation sheet, and direct students to open the Google Slide presentation. The teacher will model how to select and research a given historical event using credible sources.