A C-172 TRAINING FLT PERFORMS A GAR AFTER A NO FLAP; DESTABILIZED APCH; AT CRG; FL.

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I WAS TOLD TO RPT A 2 MI R BASE FOR RWY 5. DURING EXPLANATION OF NO FLAP LNDG TO STUDENT; I FAILED TO MAKE CALL R AT 2 MILES OUT. I WAS WAITING FOR FREQ BREAK TO MAKE RADIO CALL. WHEN I WAS 1 MI OUT TWR FINISHED TALKING TO OTHER TFC AND ASKED ACFT ON FINAL TO STATE CALL SIGN. BEING READY TO MAKE MY CALL. I STATED 'XXXX IS ON FINAL RWY 5.' TWR SAID LOUDLY 'YOU ARE NOT CLRED TO LAND; I REPEAT YOU ARE NOT CLRED TO LAND!' I INITIATED GAR PROC AND SAID 'XXXX GOING AROUND.' TWR SAID IF YOU CAN LAND AND HOLD SHORT OF RWY 14; CLRED TO LAND AND HOLD SHORT OF RWY 14.' I SAID; 'WE CAN LAND AND HOLD SHORT OF RWY 14.' ATTEMPTING TO GIVE THE STUDENT LATITUDE TO LAND WE CONTINUED WITH A FORWARD SLIP TO A LANDING FROM 1/2 MI OUT. AS WE WERE APCHING THE MIDPOINT OF THE RWY; WE STILL HAD EXCESSIVE AIRSPEED. NOT WANTING TO HAVE TO PERFORM HARD BRAKING; I INITIATED GAR PROCS; WITH AN EARLY RIGHT TURN TO STAY CLEAR OF RWY 14. I ESTIMATE 1000 FT OF RWY BEFORE INTERSECTION WITH RWY 14 WHEN TURN COMPLETE. I SAW TFC OUT 1 1/2 MILES TO 1 MI AWAY ENTERING DOWNWIND. MANEUVERED AND REMAINED WELL CLR OF TFC. THEY DID NOT ALTER COURSE AND PROCEEDED TO LAND. WE RECEIVED INSTRUCTIONS TO 'MAKE R TFC AND CLRED TO LAND RWY 5 AND LAHSO RWY 14; AND CALL THE TWR WHEN ON THE GND. WHEN I CALLED TWR; HE COMPLAINED ABOUT THE DENSITY OF OUR FLT TRAINING IN A HEATED MANNER. I FEEL HE WANTS TO MAKE AN 'EXAMPLE' OF ME!