FLC; DURING TRAINING FLT; ENTER CLASS C AIRSPACE.

Narrative

ON A TRAINING FLT; I WAS CONDUCTING XCOUNTRY TRAINING IN A C172 ACFT. I THOUGHT I FOUND A GOOD PLACE TO CONDUCT SIMULATED EMER SITUATIONAL TRAINING BY PLACING STUDENT UNDER HOOD AND ASKING HIM TO FLY COURSES. I GOT INVOLVED IN THE LESSON AND PAID LESS ATTN THAN WHAT I SHOULD HAVE AS TO PHYSICAL LOCATION. AFTER SIMULATED EMER TRAINING WAS COMPLETED; STUDENT CONTACTED RIC APCH AND ASKED PERMISSION TO ENTER CLASS C AIRSPACE. STUDENT NOTIFIED CTLR THAT HE WAS A STUDENT PLT. CTLR INSISTED THAT WE WERE ALREADY IN CLASS C AIRSPACE. WAS NOTIFIED THAT OUR POS WAS 8 MI FROM RIC; WELL WITHIN THE 10 MI LIMIT. THE FLT CONTINUED UNEVENTFULLY TO DEST UNDER ATC CTL. I AM NEW TO THE AREA AND DID NOT RECOGNIZE LANDMARKS THAT PLACED ME WITHIN THE 10 MI CIRCLE. ALSO; THE LESSON PLAN CONTAINED PILOTAGE; DEAD RECKONING; VOR NAV; COMS; INFLT EMERS; HOOD WORK; PARTIAL PANEL; TIMED TURNS AND AIRSPACE. MAYBE THIS WAS TOO MUCH TO TOSS AT A STUDENT; AS WELL AS TO KEEP AWARE EXACTLY WHERE I WAS. I HAVE PURCHASED A GPS FOR BETTER SITUATIONAL AWARENESS. IN THE FUTURE; I WILL PROGRAM THE FLT IN THE GPS AND SET UP WARNINGS TO PROTECT AGAINST AIRSPACE INTRUSIONS.