Happy Friday the 13th! If you have the opportunity to break away from your current event studies and your regular curriculum, I have an awesome list of free resources for learning about the history behind Friday the 13th and other superstitions.
https://stilllearningsomethingnew.com/2014/06/10/superstitions/
Still Learning Something New 
Thanks for this post, as I have always wondered what was the story behind the umbrella one.