Read a great article about a reading program for kids. Animal shelters have kids go in a read to the dogs. It helps kids gain confidence in reading and also helps the dogs become accustomed to human interaction.
It varies. Quite a lot. Sometimes I have no issues at all with SA, sometimes it's quite severe all of a sudden. The situation can be the same. In general I do better dealing with one or two people at a time. It's no exception to have little or no anxiety in those situations anymore, luckily.