Various studies indicate that at least 90% of the parents uses e-mail. This percentage is considerable higher when they have children. This percentage is almost 100% if they have a job.

If you are still in doubt, you can find out in a very simple and fast way. Put next to the door of the classroom a a list with the names of the children. Put behind these names 2 columns with a heading: "email yes / no" A parent who picks up his / her child simply check yes or no on this form.