帮我翻译下~~感激不尽··（不要直译，要口语话）谢谢

This is me about the final module - Extra Unit plan, this Unit that require children to go over the primary learned about Christmas of background knowledge and related words. In addition to your child about a very beautiful story - Christmas Present. So in learning this unit of time, I focus on three places: 1) Christmas custom. 2) and Christmas related some key words. 3) story important language points. Below is my study content:

1) Christmas is an of the day of December 25, mainly is the western country to commemorate the birth of Jesus. But now many countries around the world have this holiday, the custom of around slightly different, but the Christmas tree, Santa Claus, Christmas gifts these basic customs vary greatly.