Here are key resources for the Montessori First Great Lesson. This is appropriate for children in the 2nd plane of development which typically runs from ages 6-12.
Overviews
General Overview of All Great Lessons
Overview of All Great Lessons Highlighting Areas Studied
Scripts
Video Presentation of God With No Hands (Original Version)
Full God With No Hands Script as Told By Mario Montessori
Video Presentation of Coming of the Universe (Secularized from Original)
Full Coming of the Universe Script (Secularized from Original)
Resources
Miss Barbara's Great Lesson Resource Page
Free Printable Impressionist Charts for First Great Lesson
Tips and Tricks
Tips on How to Tell the Story
An Excellent Breakdown of The Great Lessons and Religion
Dairies and Journals
We Don't Need No Education - Homeschooling Family from a Creation Perspective
What Did We Do All Day - Homeschooling Family Using Original Version
Making Montessori Ours - Homeschooling Family Using Coming of the Universe Version - Combined First and Second Lesson