The Scarlet Letter: Debunking Hawthorne's Puritan Myth
This unit plan is full of excellent activities and discussion questions to help students better understand how The Scarlet Letter correlates to actual events vs. literary fabrications during Early American Colonial history.
How to Teach "The Scarlet Letter"
https://www.prestwickhouse.com/blog/post/2017/07/how-to-teach-the-scarlet-letter
This excellent article gives many wonderful tips, references, and resources to help in teaching The Scarlet Letter effectively.