For AP Gov and AP English, the same can be said for Google whenever you run into a brick wall. Think about more detailed searches whenever you have a question, and make sure to use quotation marks to ensure Google knows you NEED that specific term in your search. In addition, if looking for specific articles, sometimes adding a ".pdf" to your search will help if finding those resources much faster.
Good luck in the school year and enjoy your classes!
CrashCourse on Youtube might be good for quick review as well.
Good luck this year!