For instructors making the pilgrimage to totality for the August 21 eclipse, there is a chance school will be in session and lesson plans will need to be prepared for guest teachers (aka, substitutes).
One day could be covered by the showing of the "Total Eclipse" episode of the A&E documentary series, The Universe.
The program, episode 7 of season 5 (The Universe S5E7), originally aired September 16, 2010. It can be found online. I leave it readers to source the best version and to make it available for a classroom showing.
As I do for virtually all video programs I ever show in class, I have prepared a question set to accompany the episode. A sequence of questions that can be answered while the video plays tends to keep students appropriately focused. It is available, free of charge, at my nascent Teachers Pay Teachers website: The Resources of Phyz. I have found useful resources there and plan to add more to my own corner in the future. For now, the "Total Eclipse" question set is all that I have posted.
The Universe - Total Eclipse video questions
We will add to our "Left Behind" series with other activities for students not traveling to totality in future posts.