I'm trying to work through The Ordinary Parent's Guide to Reading with my 1st grader.  He is a wiggly, active boy, probably with some mild form of ADHD.  He is SOOO easily distracted!  Teaching him can drive me crazy because it is so hard to keep him on track.

But recently I've found a method that works for us.

1. We learn in small chunks.  Most days I can get a whole lesson done, but for lessons usually longer than a page, I have to cover it in two. 
2. Review, review, review.  I determine what he is struggling with and we review it daily for a while.  If he's got it though . . . I don't review.  We can use that time for new stuff.
3. Keep him contained.  I have an old school desk with the attached desk.  He works best in this, since he can't lay down, fall over, stand up, scoot away, etc.  I suppose you could also belt them loosely in a chair.
4. Give him help wiggling.  This summer I bought this Fit Ball seat cusion through Heads Up Now!  It has been a great way of keeping my son in his seat, but allowing him movement. 
   
5. Use aids.   Heads Up Now! also has colored translucent frames available so he can keep his place on the page without distractions from the words above or below. They also have some really neat timers and eductional materials and tips on working with ADHD students.
6. Pay attention.  He accomplishes very little if I'm trying to do other things.  Every interruption distracts him.  So I've learned to really focus attention on him so we can get it all done in an hour rather than it taking him five hours where I have to keep coming to help him.
7. Remove distractions.  My older boys have been told not to inturrupt when I'm working with him on lesson stuff.  It also helps if I turn the phone off.  We haven't yet figured out how to keep the baby from being a distraction, but I guess you can't manage it all.
8. Rewards and Consequences.  I promise a reward if he accomplished things within a certain time limit.  There is also a consequence for complaining, or just refusing to cooperate (he has to start back at the beginning of the lesson and do it all over again).  These are things he can control.
9. Lots and lots of praise.  When he does it right, I make a big deal of it.  I also brag on him often to his brothers who both already read well.  They just don't remember how hard it was to learn, so I remind them and encourage them to praise my younger son.