what do we talk about in our per game? is it just like the signals for calls.

USSF answer (February 23, 2012):
We are not aware of any formal checklist of pregame instructions, although our sponsor Official Sports and some other vendors do carry them. The referee should review the guidance given in the USSF publication “Guide to Procedures for Referees, Assistant Referees and Fourth Officials,” pointing out any additional tasks that need to be done. In turn, the ARs should ask questions to clarify what it is the referee expects in given situations.

As leader of the officiating team, the referee must establish during the pregame conference how the team will work and cooperate. The referee (depending on his or her own level of experience) should tailor the pregame to fit the composition of the refereeing crew, including their likely varying levels of knowledge and fitness; the age, competition, and skill levels of the players; and the particular requirements of the competition itself. It is often useful for the referee to develop a checklist for topics to be covered in the pregame conference. The amount of detail would be tailored to the needs (see above) of the referee, the assistant referees (ARs), and the fourth official. First and foremost, the referee must ensure that the ARs (and a fourth official) are familiar with the guidelines and mechanics laid out in the USSF publication “Guide to Procedures for Referees, Assistant Referees and Fourth Officials.”

For starters, when working with unfamiliar crew members, the very first task (after introductions) is to ask questions which (gently) elicit information about these issues — e.g., How long officiating? Grade level? Most frequent level of assignment? Club/league/association? Entry class instructor (if within first or second year of experience)? This will help the referee tailor the pregame to the needs of the team.

Ideal topics for the checklist would include the duties of the AR, signals of the AR (including NOT signalling when the referee can clearly see the incident), what to do when AR signals are missed by the referee (such as when and how long to maintain the flag); duties of the fourth official (if one is assigned); differences between the rules of the competition and the Laws of the Game, if any; what the ARs should do in situations that are not covered by the Laws of the Game, such as unofficial signals or when the AR may/should enter the field; duties at a penalty kick; a reminder to communicate at all possible moments (such as a quick look exchanged between the referee and the lead AR on all through balls or at stoppages in play. Likely the most important item is a reminder to the ARs and the fourth to immediately alert the referee to any mistakes in procedure, such as having cautioned a player a second time but failed to send that player off.

Finally, the referee should encourage the ARs (and a possible fourth official) to ask questions during the pregame conference, just to ensure that they have understood what has been discussed and what they are to do.