This is one of the most useful things I do each year. I have found that the addresses, phone numbers, and other information that the school might give me on a printed list, is not always reliable. I copy these on cardstock, and at Back-to-School Night, I have each parent complete a card. I keep these cards in my teacher bag at all times, and any time I need to contact a parent (at home or school), I have all the information I need on this card. When I contact a parent, I write the date and a short note on the back for my records.