At 10U, unless you're legitimately competing for substantial championships (Metro, State, Qualifiers, Regionals, Nationals), my plan that I would share with parents is that I am going to play them all the entire season.
They're 9 and 10.
They need to play in games to get better. While practice is fine, there is no substitute for game experience. Playing all the girls will help you in the long run when a "starter" is out or injured and you have another girl who has played nearly 80% as often waiting to take her place in an important game. She'll be ready and able and eager rather than terrified.
In order to do this, you have to make your families understand that it is part of the plan. You have to have a vision for the team short-term, a year down the road, two years down the road. Formulate your vision, and share it with them and tell them that playing all 12 now is part of the plan to get them where you want them to be as far down the road as your vision leads you.
They're 9 and 10.
They need to play in games to get better. While practice is fine, there is no substitute for game experience. Playing all the girls will help you in the long run when a "starter" is out or injured and you have another girl who has played nearly 80% as often waiting to take her place in an important game. She'll be ready and able and eager rather than terrified.
In order to do this, you have to make your families understand that it is part of the plan. You have to have a vision for the team short-term, a year down the road, two years down the road. Formulate your vision, and share it with them and tell them that playing all 12 now is part of the plan to get them where you want them to be as far down the road as your vision leads you.