This lesson  introduces students to life expectancy as a measure of development and asks them to investigate life expectancy in the US and globally using data from the CDC, Gapminder and Our World in Data. It also also engages students in watching and debriefing  a TED Talk called “How humanity doubled life expectancy in a century” and a short video called “The #1 reason people die early, in each country.” The lesson features a free powerpoint presentation on life expectancy by Gapminder which illustrates how life expectancy is calculated and compares life expectancies in Burundi and Sweden.