In this trial, your teacher will act as the judge. The jury is usually a group of ordinary citizens selected to decide the case. A jury usually is made up of a group of six or twelve individuals, depending on state law. In most states, a jury must reach a unanimous verdict. That is, all members of the jury must agree with the decision.
Some states allow for less than a unanimous verdict in some civil cases.
That means that the jury was unable to reach a decision. In that case, the case can be tried again. In this trial, your teacher will act as he jury. Witnesses must have specific knowledge of what happened. Expert witnesses may not know the specific facts in the case but may use their specialized knowledge to help the jury understand complex evidence, such as the degree of intoxication that results from drinking certain amounts of liquor.