Some students have asked for resources about the US Government. Here are three of increasing detail:
The government itself has put up a brief guide to the three branches of government and their operation, with a couple pretty infographics. usa.gov, branches of government
For a (slightly) longer description, with a special focus on the current composition of the government, [Sandy Maisel of Colby College has an article for the textbook publisher scholastic.](https://www.scholastic.com/teachers/articles/teaching-content/united-states-government/]
The Wikipedia article on the Federal governnment does what wikipedia does best and worst; provides loads of links so you can follow further on, but occasionally gets into too much detail about unimportant technicalities.