Teachers need to talk to other teachers. Without communication there's a void. Good communication can head off a potential problem. A challenge can and should be approached jointly by teacher and parents and also if the need is there for the child's presence. New paths of communication are smoothing the way for busy parents.
Some teachers now have websites and their own information where their own information is on-line.
There are also those who are selecting e-mail for better communication. It is very important to be visible, introduce yourself at the beginning of the year to the teacher. It is also important to inform teachers about any special circumstances that might affect the child's learning. Often times we underestimate the impact something does have on a child at any age. A recent experience for myself was the death of my father whom my youngest son was very close to.