A Leap Year

Download this 12 slide PowerPoint  Leap Year to use in an assembly or science lesson to explain why every four years we have a leap year.  This PowerPoint includes images and text which will help children to understand how long it takes the Earth to orbit the Sun and how the changes in the Julian and Gregorian calendars have come to influence the extra day on 29th February every four years.  Get children to think about when they would have their birthday if they had been born on 29th February.  Download now and share with your class, or school!