Barkley's Executive-Function Model
Not a class, a lens, and the science under most of the methods here. It changes what you even try to fix. Four moves follow from one core idea.
The reframe
ADHD is a performance problem, not a knowledge problem. You know what to do; the breakdown happens at the point of performance, the exact moment and place the action is needed.
Rule 1
Don't lean on memory. Put the cue where the action happens, so the right thing is physically in front of you at the moment you need it.
Rule 2
ADHD dulls the internal sense of time. Make time physical, a clock or timer you can see, sitting right in the workspace whenever timing matters.
Rule 3
Internal drive is weak for boring tasks. Inject an immediate, even artificial, reward right at the point of performance instead of waiting on a far-off payoff.
Rule 4
Fast, frequent feedback and environmental cues beat instructions and delayed rewards. Shrink the gap between doing the thing and feeling the consequence.