If any child has completed the elementary course of study in the public schools of the district in which he resides, and resides three miles or more, by public road, from the nearest high school in the district, unless proper free transportation is furnished, he may attend any more convenient high school in another district, without the consent of the board of school directors of the district in which he resides, and the district in which he resides shall be liable to the district whose high school he attends for the tuition charge provided for in this act.
24 P.S. § 16-1609