Look At Your Partner(s)!!!!!!

[ref2coach]

In an NFHS match.
The IFK signal is one open hand held up straight.
The stop clock signal is both hands open and crossed at the wrist above the head.
The Goal signal is, Whistle, Stop Clock signal, Point to center circle.

I do not see how these signals can be confused.

In pregame for a "dual referee" game. I attempt to get an agreement that we will make eye contact on every ball out of play situation. If my partner does not look at me on the fist couple of opportunities, at the next ball out of play, I will call out "hey partner" when s/he finally looks at me, I point to my eyes with a big smile. Most of the time the rest of the game I get the eye contact and return a smile or thumbs up.