Kip Richard Arnold, 51, pleaded guilty to committing lewd acts on a 14-year-old girl and evading police in a Downey courtroom in November.
The physical education teacher had been the focus of a child molestation investigation involving a former student.
The suspect led police on a wild chase from Lakewood to Rolling Hills Estates in July that ended with his car launching 70 feet down an embankment and into a tree.
Officials had to extricate the 51-year-old from under his truck following the crash.
