School Aide To JailSAN DIEGO (UPD—The President of the Vallecitos Elementary School board today faced six months in county jail for the fatal shooting of a Lake Tahoe businessman.William H. Hitt, 31, was sentenced vesterdav. He was con-W ' - - V dvicted of involuntary manslaughter for the death of Ar-kell Burnap. 31, April 24.Hitt admitted shooting Burnap in an argument over the driving of a go cart on the school grounds. Superior Judge John A Hewicker imposed the sentence as a condition of probation of a prison term of up to 10 years.