Would you mind sharing what are the strategies you use with your DD?
We've tried a few things. One, in re to perfectionism, she tends to spend too long on things and has had to learn how to let some things slide when she doesn't have the time. She's in high school now so she can track her grades online. We've talked about the weighting system her teachers use so she knows where to place the most effort and has been willing to not do her absolute best on some projects b/c she has a very high A in the class and can afford to get a lesser grade. I've helped her figure out the lowest grade she can get on a given project and still keep an A with a little cushion. She's learned to let go some.
In regard to working at her fastest rate: She's checked with teachers as to how long assignments are supposed to take and then timed herself to see if she can get them done in that time. She's tried working as fast as she can and seeing how much she can get done in x minutes and then using that to estimate how long the whole assignment is likely to take.
She also tends to be distracted by noise. This isn't as bad as it was when she was younger, but even today she said that she got thrown a bit on a computerized French test b/c the girl next to her kept talking while she was trying to think. She hit "enter" too soon on a few parts and missed questions that she said she knew after hitting the enter key (she couldn't go back). We've tried to keep her working in her room where it is quieter if she needs to concentrate and she had a 504 plan earlier in elementary which included quiet testing environment and seating away from noisy objects like the heater and pencil sharpener.
Basically, we've tried to make the environment as conducive to success as possible, she's learned to do a good enough job at times and let go on perfection, and she sometimes pushes herself to work as fast as she can, but it still honestly isn't even close to as fast as someone with fast processing speed.
