Yes it was. They are saying the pledge of allegiance in that shot.

My school also joined in on saying the pledge of allegiance together with the rest of America. However, our school gets out at 1:55, so we did it at 1:45 It was really special... when we are supposed to say it in the mornings, no one really does it. They stand up and slouch back down, and some people even talk through it. But this afternoon, the whole school said it together and no one had the nerve to talk or laugh. It was really beautiful.