it will be especially hard when he sees you again and keeps pounding on the table every five minutes. don't be surprised if he gets mad because your silverware isn't properly positioned relative to your plate.
learn to say, Hoooora! and expect him to say it a lot. "good to go" or "GTG" will also become commom.
send him lots of mail while he's there. put stickers on the outside of said mail and be sure you write things like, "Love you so much" and "you're my Navy man" on the outside. He'll not only enjoy getting that mail but it will help keep him in tip to shape while at OCS. If you are mad at him, put, "Fly Airforce" on the outside of the envelope.
The class as a whole will appriciate it if you send him cookies too.