During my 2nd day as a white belt, I actually got to participate with real white belts.  I was able to help both them and me during the breakout session when we went over White Belt Self Defense.  I was the attacker tonight (I'm usually the defender), and I was shown something tonight that, as the attacker, I didn't even realize.  I'll always believe you can learn more by teaching something than just memorizing, then doing it, especially if you're doing it by yourself a lot.