Several of us were talking a few days ago about different ways to design hook activities that would engage kids while also encourage writing skills.
My favorite is to use thought bubbles on paintings or photos. Thought Bubbles ask kids to imagine what the people in the image are thinking.
Start by finding a photo or painting depicting an event, idea or group of people that helps introduce your content. I used the famous Emmanuel Leutze painting of Washington crossing the Delaware as my starting point.

