I send email to each of my 2e ds's teachers every year. I give them all our contact numbers and email addresses. I also tell them that ds has an IEP, and I offer to send in a copy if they want (while most sped teachers are on the ball, not all are, and I don't want to get halfway throught the year and find out he's getting no services or that the teacher didn't know he had accomodations). I briefly describe his disability, tell them what meds are in the clinic, and explain behaviors that could get him in trouble (taking a long time in the restroom, for example) in the first few days. I try to keep it short. If the teacher writes back, I might give him/her a little more info.