Common Core Standards
Grade 1
Reading RL.1.2
Retell stories, including key details, and demonstrate understanding of their central message or lesson.
If students can perform the first standard, then this standard should be a piece of cake. They might need some helpful guidance to understand the central message of a story (for example, "Why does the person in Green Eggs and Ham keep on refusing to eat them?"), so be prepared to give students leading questions.