Treatment is a synonym of Deal. Deal is related to Offer. Offer is a type of Produce. Produce is related to Shopping. 
Discovery is derived from Discover. Discovery is related to Educational. Educational is derived from Education. Classroom can be used for Education. 
Treatment <--Synonym--> Deal <--RelatedTo--> Offer --IsA--> Produce <--RelatedTo--> Shopping 
Discover <--DerivedFrom-- Discovery <--RelatedTo--> Educational --DerivedFrom--> Education <--UsedFor-- Classroom 