Do parents have to consent to school device management?
Usually yes, or at least they must be informed, and consent matters most for location. Whether parents can opt out of a managed school device is a school policy decision. Skie provides controls, the school provides notices. This is general information, not legal advice, so check local rules.
Managing a student's device is a normal part of running a school programme, much like a school network or uniform policy. Even so, most schools tell parents before they hand a device over and many ask for a signed agreement. Where the device tracks location, a clear written consent is the safer course in almost any country.
Opting out is a different question. If a school issues devices only as managed devices, a family that does not accept the rules would not receive one, or would be offered an alternative such as a non-device arrangement. That is the school's decision and it is best written into the policy in advance. Skie does not make that call for you.
A good agreement covers what is managed, what is filtered, whether and when location is used, who can see it, what happens when the student leaves, what the family should do if a device is lost and who to contact with questions. It should read the same way the device behaves. The more specific it is, the fewer disputes follow.
Remember the other side. Parents on school-managed devices are read-only in Skie, so they can see their child's device without changing the organisation's rules. That visibility is often what turns a sceptical parent into a supportive one.
A practical tip: hold a short parent meeting, ten minutes at a normal school event, and show the dashboard view a parent would get. Seeing what is and is not visible is more convincing than a letter.