Gonna be a Leap Year

By George C. Baxley 

This year we will add the 29th of February to our year?  Why do we do that?  How can you tell?  What if we didn't add a day every 4 years? Students work with a flow chart to deduce what years are going to be leap years.  They learn about the exact measurement of a solar year and how our Gregorian calendar needs to be adjusted to accurately align the calendar with the Earth's revolutions around the Sun.