The short answers about the certificate and the Capitol hackathon.
An award given by Hack Club to any student who publishes and open-sources their Congressional App Challenge project. It's recognised by several institutions and comes with an invite to Capitol, Hack Club's hackathon in Washington, D.C.
To qualify, you need to:
The certificate is recognised by MIT School of Engineering, GitHub, the Congressional App Challenge, Girl Scouts of Greater New York, The Knowledge House, Code.org, and other institutions.
Capitol is a 36-hour hackathon in Washington, D.C., October 9th to 11th, for certified students. It's 100% free: food, merch, and travel stipends are covered. For every hour you work on your Congressional App Challenge project (logged with Hackatime), $10 is added to your travel stipend.
Set up Hackatime to track your coding hours from your editor, and note the project name you track under when you submit. The resources page walks through it.
The longer guides cover building, documenting and submitting your project in detail, and the Slack is the fastest way to get a question answered.