PLT DOING PRACTICE INST APCHS ENTERS CLASS B AIRSPACE WITHOUT CLRNC DUE TO PROX OF ARPTS AND APCH PROCS.

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FLYING VFR FROM 00V (MEADOWLAKE ARPT) TO FTG (FRONT RANGE ARPT) FOR INST PRACTICE APCHS WITH MY INSTRUCTOR. I CONTACTED DENVER APCH ABOUT 45 MI S OF MILE HIGH VOR; GAVE THEM MY DEST AND INTENTIONS OF DOING AN ILS APCH. I WAS GIVEN A SQUAWK AND CLRNC TO FTG. A FEW MI S OF FTG APCH ASKED IF I HAD THE ARPT IN SIGHT AND I DID. APCH THEN TOLD ME I WAS CLRED TO MAINTAIN 7000 FT OR BELOW AND TO SQUAWK 1200; RESUME OWN NAV AND FREQ CHANGE APPROVED. I PROCEEDED TO FLY SEVERAL PRACTICE ILS APCHS TO RWY 17 AT FTG NOT REALIZING THAT DENVER'S CLASS B AIRSPACE WAS JUST 1 MI N OF RWY 17. I WAS NOT IN CONTACT WITH DENVER APCH AT THIS TIME AND FLEW INTO THEIR AIRSPACE SEVERAL TIMES AS I DID THE FULL ILS APCH WITH PROC TURN. AFTER THE SECOND APCH UNICOM CONTACTED ME ON CTAF AND ASKED ME TO CONTACT DENVER TRACON. I DID THIS AND WAS TOLD OF MY INCURSIONS INTO CLASS B AIRSPACE. I PROMPTLY FOLLOWED INSTRUCTIONS TO FLY E OUT OF THEIR AIRSPACE WITH A REQUEST TO CALL THEM AFTER LNDG. I CALLED DENVER TRACON AFTER LNDG BACK AT 00V; WAS TOLD OF MY AIRSPACE INCURSIONS AND I APOLOGIZED. WE ALSO TALKED A LITTLE ABOUT CHARTS AND I DID HAVE CURRENT CHARTS WITH ME INCLUDING A DENVER TERMINAL AREA CHART. I ASSUMED WHEN I WAS RELEASED ON INITIAL APCH TO FTG THAT I WAS FREE TO SHOOT APCHS STAYING UNDER 7000 FT MSL. SINCE I WAS LOOKING AT AN APCH CHART I DIDN'T REALIZE I WAS IN AND OUT OF CLASS B AIRSPACE. THE CAUSE OF THIS WAS MY NOT REALIZING MY RELATIVE POS TO THE CLASS B AIRSPACE AND THE APCH CTLR RELEASING ME TO MY OWN NAV. AFTER TALKING TO THE CTLR ON THE PHONE; I SHOULD HAVE ASKED FOR THEM TO AT LEAST MONITOR ME OR TO KEEP ME WITH AN APCH CTLR. I DON'T SEE A CORRECTIVE ACTION. WHAT WE HAVE IS AN UNCTLED ARPT EXTREMELY CLOSE TO A VERY LARGE ARPT WITH APCHS XING EACH OTHER WITHIN 1 MI. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES HE HAS HEARD NOTHING FURTHER REGARDING THE INCIDENT TO THIS DATE. HE WAS FLYING A PIPER AZTEC AND WAS THE FIRST INST STUDENT OF THE CFII ON BOARD. THE INSTRUCTOR APPARENTLY WAS NOT VERY SHARP ON THE AIRSPACE INVOLVEMENT ON THIS APCH. THE CTLR DID NOT INDICATE THAT HE WAS TAKING ANY FURTHER ACTION. RPTR SAYS THE CLASS B AIRSPACE OUGHT TO BE SHOWN ON THE APCH PLATE ITSELF AND ONE SHOULD NOT HAVE TO BE USING ANOTHER CHART TO DETERMINE HOW TO AVOID THAT AIRSPACE.