Flight Crew Flight Instructor
Conflict NMAC
General None Reported / Taken
Human Factors
We were climbing out on the departure approximately 4 miles south of FFZ climbing through 3;300.  The Student in the back right seat reported seeing a bright red circular drone about 3 feet in diameter pass approximately 50 feet below us on the right side.  I did not see it personally but we reported it to FFZ Tower with location and description.  It was a bright red in color.
A PA-44 crew reported a NMAC with a drone beneath PHX Class B airspace after departing FFZ.