The Solar Eclipse Computer is a free tool from the Astronomical Applications Department of the U.S. Naval Observatory. The Solar Eclipse Computer lets you enter a city and state to determine the time the eclipse will start and end in that location. It will also provide you with the level of obscurity at a chosen location. For example, Portland, Maine will only experience 58.8% obscurity.
Earlier this week Steve Spangler went on a rant about schools that are keeping kids indoors during the eclipse. Thankfully he didn't just rant, he offered some suggestions on safe ways to experience the eclipse. Steve Spangler's video is embedded below.
In his video above Steve mentioned making eclipse viewers. Here's an article from Time about how schools made viewers in the 1960's. The same process still works. (Thanks to Bethany Virginia Norris Smith for sharing the article on Facebook).
This video from Physics Girl explains the difference between a solar eclipse and a lunar eclipse.
Star Net, a production of Space Science Institute's National Center for Interactive Learning, has partnered with American Library Association, the Lunar and Planetary Institute, and the Afterschool Alliance to provide more than 2 million free eclipse glasses to public libraries across the country. You can use this Star Net interactive map to find a library near you that is hosting an eclipse viewing event and is offering free eclipse viewing glasses.
On Thursday SciShow kids released a new video about making eclipse viewers (AKA pinhole projectors).
If you're not in the "path of totality," you may want to check out Exploratorium's live stream of the eclipse. Exploratorium has additional resources on their streaming page.
Finally, National Geographic offers Solar Eclipse 101.