In middle-high school, there are a lot of times where sending letters home with the student is most ideal. I teach over 200 students so it's too hard to contact all parents via cell/work phone. Instead I send the notice of whatever home with the student. The student then signs and dates this document stating they received it and will deliver to their parent/guardian. This is an AMAZING c.y.a for any issues that could arise later in the year.