We just gave a raise to DD11(almost 12). She is now getting $10/week because she has completed a babysitting class and can now watch DD5 for an hour or two while I run errands. By not having to take my little tornado along, I save at least that much We do not pay for chores or good grades because we'd go broke. DD5 won't get an allowance until she starts Kindergarten. This has created a lot of melt downs because DD5 feels it's sooo unfair.
DD11 gets to do with her money whatever she wants. She is expected to budget and we don't help out just because she spent all her money on a video game and has nothing left to go to the movies. That's life. Can't do it all... DD11 has been pretty good about keeping an "emergency savings", though.