E.T.
Use of technology while caring for the kids (phone, IPad, computer, TV)
Other responsibilities (food prep, laundry, toy pick up, cleaning, etc.)
Transportation to activities outside the home (car seat use, consequences for moving violations when the kids are in the car, etc.)
Allowance for activities with the kids
Visitors while caring for the children (play dates and visits from her friends/boyfriend)
Requirements for continuing education (at a center she would be required to stay certified in infant/child first aid and CPR, dangers of shaken baby, safe sleep practices, etc. A friend of mine has a grandson who had a nanny who shook him. Thankfully he will probably be ok, but he has a long road ahead of him.)
Sick leave for the nanny. Maybe not in the contract, but she definitely needs to have a back up plan for when the nanny is sick and can't care for the kids. Will she take a sick day?