At 10U, your challenge as a coach (whether it is TB or rec) is to teach them how to play the game and to LEARN TO LOVE THE SPORT. There are any number of ways that can be accomplished depending on your situation - there is no one right answer.
I personally would see if you can bat the lineup, and mix it up as much as possible (even at 14U rec I made my batting order by the order they showed up for the game - the girls and parents all knew this, and the best players showed up early anyway, so it works itself out - I also don't mind rewarding the kid who is not as skilled but gets there early to warm up!).
If you can't bat the lineup, get as many of the kids in the batting order you can (ie use your EPs), and rotate your subs not in the lineup from game to game. DO NOT let yourself get caught up in having some girls "play the minimum" each game - you will certainly lose those girls' interest in softball forever.
Make the games fun, make sure the girls believe they are contributing to the team each game, and make sure it is not all about winning. If the girls are learning to love the game, winning takes care of itself.
I personally would see if you can bat the lineup, and mix it up as much as possible (even at 14U rec I made my batting order by the order they showed up for the game - the girls and parents all knew this, and the best players showed up early anyway, so it works itself out - I also don't mind rewarding the kid who is not as skilled but gets there early to warm up!).
If you can't bat the lineup, get as many of the kids in the batting order you can (ie use your EPs), and rotate your subs not in the lineup from game to game. DO NOT let yourself get caught up in having some girls "play the minimum" each game - you will certainly lose those girls' interest in softball forever.
Make the games fun, make sure the girls believe they are contributing to the team each game, and make sure it is not all about winning. If the girls are learning to love the game, winning takes care of itself.