You are at your children's lessons? I mean not just physically being there, but actually watching your children.
I was watching my 4 year old in his karate class tonight and as I looked around I noticed that of the 8 other parents that were there....I was the only one paying attention to what the kids were doing. EVERYother parent was playing on their cell phone nearly the whole time. I know there are always exceptions for needing to use your phone...but I think barring anything major that the parents attention should be on their child.