Final answer:
A school can be sold with the provision that title will revert to the grantor if the property is no longer used as a school by using a fee simple determinable ownership.
Step-by-step explanation:
The form of ownership that allows a school to be sold with the provision that title will revert to the grantor if the property is no longer used as a school is known as a fee simple determinable ownership.
In this form of ownership, the grantor transfers ownership of the property to the recipient (grantee) as long as the property is used for a specific purpose, in this case, as a school. If the property ceases to be used as a school, ownership automatically reverts back to the grantor.
For example, if a private individual donates a school building to a school district with the provision that ownership will revert if the building is no longer used as a school, this would be an example of fee simple determinable ownership.