PA28 instructor reported three traffic conflicts requiring evasive action.

Attributes
ACN	1574478
Time
Date	201808
Place
Locale Reference	APA.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-28R Cherokee Arrow All Series
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	None
Person 1
Function	Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 4500 Flight Crew Type 300
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal .25 Vertical 500

Narrative:

While on initial decent towards kapa at the completion of a training flight; we received a TA. We maneuvered the aircraft to the north as the other aircraft was southbound. Once appropriate course was established; we resumed decent. However; the other aircraft then turned northwest in front of us and we received another TA. I elected to pull up and turn away aggressively while looking for the other aircraft. The student and I established visual contact and resumed our approach to kapa. It should be noted that we nearly violated the denver class B airspace as a result of the evasive maneuver. This was the third close call in one day! We did contact ATC to confirm that no airspace violation had occurred and they confirmed we did not enter the class B. It would be great if an alert area was charted in the areas southwest and southeast of kapa. Thanks and feel free to contact me any time.

Original NASA ASRS Text

Title: PA28 instructor reported three traffic conflicts requiring evasive action.

Narrative: While on initial decent towards KAPA at the completion of a training flight; we received a TA. We maneuvered the aircraft to the north as the other aircraft was southbound. Once appropriate course was established; we resumed decent. However; the other aircraft then turned northwest in front of us and we received another TA. I elected to pull up and turn away aggressively while looking for the other aircraft. The student and I established visual contact and resumed our approach to KAPA. It should be noted that we nearly violated the Denver Class B airspace as a result of the evasive maneuver. This was the third close call in one day! We did contact ATC to confirm that no airspace violation had occurred and they confirmed we did not enter the Class B. It would be great if an alert area was charted in the areas SW and SE of KAPA. Thanks and feel free to contact me any time.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.