One of the building blocks of a democratic society is an educated citizenry. If citizens don't know their legal rights and how to enforce them, they will be taken advantage of. Ignore your rights, and they will go away.
The police-citizen encounter is a very dramatic contact with "the government". All citizens should know how the Constitution works and what rights all citizens have.
Rather than "reproduce the wheel", here's a link to vital information provided by the Ohio State Bar Association entitled, "Your Rights if Questioned, Stopped or Arrested by the Police": www.ohiobar.org
These are excellent introductions to a complex subject matter.