Traditionally the first and last levels (district and supreme court) used juries; however the practice of juries in the current Supreme Court as well as the US Court of Claims is no longer in use. As a general way to say this, any appellate court does not use juries.
The US District Courts are the federal trialcourts of general jurisdiction that use juries.
district court
In US the lowest level of court is District Court.
Yes they are the court where any case in the federal system begins its life.
True (A+)
The federal court system has three main levels: district courts (the trial court), circuit courts which are the first level of appeal, and the Supreme Court of the United States, the final level of appeal in the federal system.
Federal judges on the US Supreme Court are called justices.
In the US federal court system, you may be referring to the US Court of Appeals Circuit Courts, which are sometimes called intermediate appellate courts because they are between the US District Court (trial court) and the Supreme Court of the United States (final appellate court).
federal court system
Federal district court, e.g., United States District Court for the Central District of California (C.D. Cal).
In the Federal Court System, the US District Courts ARE the lowest level of court, and have original jurisdiction (over FEDERAL offenses) within their assigned districts (of which, I believe, there are 94).
The lowest general level in the Federal System is the Federal District Court, which sits in a defined federal district. An example would be the "Federal district Court for the Western District of Oklahoma" This district court answers to the Circuit Court ( e.g. 10th Circuit etc.) and then to the US Supreme Court by Certiori
Courts of Appeals is the intermediate-level federal court the courts of appeals is considered the workhorse of the court system.