This is a very well-known festivity in Anglo-saxon countries, especially in the USA. If you want to know something about this you could do some exercises:
- a listening comprehension: click here to do it
- some activities in this page of British Council: click here
- vocabulary: try to fill in this crossword exercise
- Comparing British and American Halloween: 10 differences
- By the way, if you want to know differences between British and American English, click here.
- If you want to read a scary short story, this is a sample as a fill-in-the-blank exercise: click here
- Why don't you try to write a spooky story? You can do it in Classroom.