From the Buckle of the Belt of Totality: Solar Eclipse 2017
Here is a vital instructional video, 2 minutes long, regarding the eclipse: https://youtu.be/GD2Znr7kFG4
Lots of curricular connections for the first coast-to-coast eclipse in the U.S. in 99 years: timelines, equations featuring 99, songs with moon, sun, 99 lyrics, dances with rotations, spinning tops, tweets with only 99 characters… use your imagination!
Or, simply make a keyhole camera:
And add 21st century decorations: