On Sunday, November 4 at 2 a.m, clocks in U.S were set back by an hour as Daylight Savings came to an end. What is DST? Who first proposed the idea? Is it practiced around the world? Let's take a look in this video. [0:37]

During this instructional activity students are going to take a look at moon phases and sunrise-sunset times in order to learn about daylight hours. Students discover that we do not always have the same amount of daylight each day. This...