Human is related to Language. Language is related to Written. Written is a form of Write. 
School is related to Educational. Educational is derived from Educate. Education is etymologically related to Educate. 
Human <--RelatedTo--> Language <--RelatedTo--> Written --FormOf--> Write 
School <--RelatedTo--> Educational --DerivedFrom--> Educate <--EtymologicallyRelatedTo-- Education 