Newbie Controller

Newbie controller on the airwaves at tower position today... Talk about a cluster fuck and I am glad no one got hurt (that I know of). Unfortunately, my student isn't the greatest on the radios and is an ESL student, and gets confused when someone starts yelling at him...

Best exchange of the day:
ATC: Cessna 49439, turn base.
Student: Say again?
ATC: Cessna 49439, TURN BASE!!!
*Student looks at me with deer in headlights look*
Me: Cessna 49439 is on final, unable turn base.

Another quality exchange:
ATC: Dakota 8183X, go missed approach [for runway 18]
8183X: Dakota 8183X going missed.
ATC: Cessna 49439, do you have the Dakota in sight? [we are on final for 14]
Student: Looking for traffic.
*30 seconds later and we are on short final*
ATC: Cessna 49439, do you have the Dakota traffic in sight?
Student: Negative.
ATC: It's right off your right wingtip!
*I know the Dakota isn't anywhere near where we are*
Student: Negative traffic
*student begins to take evasive action on short final and I tell him to fly the aircraft before we become a smoking hole*
8183X: We have the two cessnas in sight
Later on, I talked to the Dakota pilot and she said she was 500ft away from the Cessna behind us in the pattern. I bet the other Cessna had no clue they were about to die if the Dakota didn't maneuver out of their way. GO ATC!!!

I hate this controller, and on a busy day like today he screws up and begins yelling at the pilots. Then the flight training becomes totally unproductive with students b/c the student is getting yelled at for not complying with non-nonsensical demands and they shut down.