The News-Herald reports (http://goo.gl/rKv4Pp) that Stefanie Courson was arrested Friday following a month-long undercover operation.
Authorities say that an undercover detective bought Xanax and Morphine pills from Courson on several occasions.
The 42-year-old Courson was charged with the sale of dangerous drugs, sale of narcotic drugs, sale of prescription only drugs, and possession of prescription only drugs.
Officials say Courson is a kindergarten teacher at Havasupai Elementary School in Lake Havasu City.
Also arrested was 43-year-old Michael Stucker. He is facing a number of drug charges.
Courson and Stucker are at the Lake Havasu City jail pending their initial appearances.
It was not known if either had attorneys.