C172 flight instructor reported a runway excursion after landing.

Attributes
ACN	1628475
Time
Date	201903
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	None
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Instrument
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 500 Flight Crew Type 300
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Loss Of Aircraft Control Ground Excursion Taxiway

Narrative:

Instructor landing with a student pilot after a short cross country. Approach speed and path were good. Touchdown was a little hard. Told the student to turn left on taxiway G. He still had too much speed but began the turn after a slight delay. We began to skid as we turned sharply and I took flight controls. When I did; I noticed there was some power still in. I reduced power; brought the yoke back; and aimed between the taxiway lights. Once straightened out; I applied brakes and stopped in the grass to the right of taxiway G before the hold short. I contacted tower and they told me to wait for emergency vehicles. There was no damage to the aircraft nor injuries. After an inspection by the fire department; [the FBO] towed us back out onto the runway. We started up again; contacted tower; went to taxiway F; contacted ground; and taxied back to [the FBO].

Original NASA ASRS Text

Title: C172 flight instructor reported a runway excursion after landing.

Narrative: Instructor landing with a student pilot after a short cross country. Approach speed and path were good. Touchdown was a little hard. Told the student to turn left on Taxiway G. He still had too much speed but began the turn after a slight delay. We began to skid as we turned sharply and I took flight controls. When I did; I noticed there was some power still in. I reduced power; brought the yoke back; and aimed between the taxiway lights. Once straightened out; I applied brakes and stopped in the grass to the right of Taxiway G before the hold short. I contacted Tower and they told me to wait for emergency vehicles. There was no damage to the aircraft nor injuries. After an inspection by the fire department; [the FBO] towed us back out onto the runway. We started up again; contacted Tower; went to Taxiway F; contacted ground; and taxied back to [the FBO].

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.