PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Commercial
Flight Crew Last 90 Days 145; Flight Crew Total 1518
Communication Breakdown; Situational Awareness
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors; Procedure; Airport
While returning to ZZZ from the south after an instructional lesson; we made a radio call approximately 10 miles out reporting our intentions; around the same time I heard a non flight school aircraft report they were departing but the call was very weak and had a lot of interference with it (I believe this to be the conflicting aircraft but did not hear any type/callsign). We continued to report our position as we got closer to the airport and reported our intention of entering a 45 to downwind for Runway XX at ZZZ and while we entered and were on the 45 to downwind. While on around 3 NM I noticed an ADS-B target departing Runway XX and was climbing so I tried to look for them in case they were remaining in the pattern. After about 5-8 seconds of looking and not seeing them I returned my focus to ahead of the aircraft; it was at that time that a small high wing aircraft (appeared to be a piper cub); was at our 12 o'clock and level at the same altitude heading straight towards us. I immediately took the controls from the student (who was flying at the time) and entered a rapid descent and began banking the aircraft to the right. Well after we began to maneuver away from the aircraft I noticed them start to climb and turn (to their right). It appeared that the other aircraft did not have us in sight until our maneuver.I did not hear any radio calls from the other aircraft at any point before (except possibly as mentioned above) nor after the event.ZZZ is in need of a Control Tower; it is an unsafe airport with the type of flight operations; how much activity there is. There seems to be close calls for various types of events nearly every day.
PA-28 instructor pilot reported a Near Mid air Collision and took evasive action.