This is an excellent activity to help your students practice selecting the best evidence to support claims. Hang the 20 posters throughout your classroom and ask students to visit each one to determine the best piece of evidence to support the claim. Once they select the best piece of evidence, they will uncover a message.
 
This bundle includes:
Google Slides Presentation on Evaluating Effective Evidence
Classroom Posters: Indicators of Effective Evidence
Textual Evidence Scavenger Hunt Activity
Scavenger Hunt Reflection