Advice for a volleyball captain

CaptainVolleyBallI am proud that my 13 years old niece Cameron has recently become the volleyball captain in her volleyball class. Tonight we discussed via Skype on how to motivate the “weakest link” in her team besides telling her to practise more and work harder. I asked Cameron the following questions:
1) What are some other ways that you as a captain can do to encourage her?
2) Put yourself in her shoes, what can you do to motivate her?
3) What can the team do to support her?