All of the Dell Chromebooks come standard with a warranty. That warranty was upgraded to an Accidental Damage Protection (ADP) warranty. Essentially it is an insurance policy for accidental damage: a cracked screen, a damaged case from a drop, etc. The ADP warranty is limited to one incident per year per device.
If a student exhausts their ADP warranty and a second incident occurs, the student's family will be responsible for a replacement Chromebook. Estimated costs is $300.