Substitute or Student?

I was subbing today and it was a weird situation b/c there were 2 teachers in the class (it was a kindergarten class of 28) and there were 2 subs... ODD. I was only there a 1/2 day, but still- that's a lot of teachers! 

Anyway, the weird part. The teacher was talking about coins and I was sitting next to some of the kids on the carpet and the other sub was sitting ON the table. The teacher held up a dime and asked, "what is this? do you remember?" The kids yelled out penny and nickel, but no one said dime. The teacher asked again, "It's not a penny or a nickel, does anyone have a different guess?" And the sub who was ON the table YELLS out, "Dime."

She does understand that she's not a student right? And that the kids need to answer, not the substitutes?