We have trouble with:
--initiation (hard to start)
--not seeing the steps that lead to success clearly (being able to think ahead/organize/anticipate)
--not being able to organize the steps (much much easier to do what's comfortable than learn unfamiliar steps; worse in situations that have high stakes)
Same issues here with DD11. Combined with anxiety, this can easily create an "I would prefer not to" situation.
My DD does not yet have a diagnosis, but I have found this website helpful with approaches to schoolwork:
http://www.additudemag.com/We chose to send DD to the less challenging magnet middle school for the sake of everyone's mental health. The difficulty level is not the issue; organization and amount of busywork is. I am coming to see that her "other" issues may mean that compromises will be made. That is okay. Not all the way to easiest. But easier.
FWIW, sometimes I think that we are trying to do is just stuff that most children need to be taught anyway but aren't. I mean, some kids are naturally really motivated and organized, but not THAT many.