Hermione gave up the time turner because it had screwed up her life and it was a lot of stress for her.
Hermione's Time-Turner does spin. The spinning motion is how Hermione turns back the clock.
Because hermione gave the time turner back to professor McGonagol
a time turner to go back in time
She actually goes back in time using a time turner. She puts it on a chain around her neck and turns the time turner back how ever many hours back she needs to go. 1 hr=1 turn
Hermione Granger
The time turner
Hermione receives the Time-Turner from Professor McGonagall, who has arranged for her to use it to attend multiple classes occurring at the same time. McGonagall explains the device's purpose and grants Hermione permission to borrow it for the school year. Dumbledore is aware of Hermione's use of the Time-Turner, as he supports her academic endeavors, but it is McGonagall who directly provides it to her.
Sirius escapes with the help of Harry and Hermione (Hermione has a time turner)
Hermione's time turner
You have to find a shop run by wizards.
They use a time turner.
Buckbeak was executed by the Ministry of Magic. However, Harry and Hermione saved him when they went back with the time turner.