It was one class, his morning class and apparently the other science teacher down the hall popped in for a minute to give them something to do then left to be with her class. Ds says they did what was asked of them and then talked amongst themselves. I imagine the principal is aware of the snafu and complaining about it after the fact might be counterproductive. Needless to say, I am keeping tabs on what goes on in there and luckily my ds is open with me.
I have a feeling that class is bonding nicely at the moment (being facetious here, but also not).