We're just back from convention and are working to get caught up on everything. So, I'm just seeing your post now.
Little boys are just pretty busy, aren't they!
One thing I think that is important to keep in mind is that LHFHG is meant to be an exposure to many new skills, but exposure is different than mastery. What I mean is that exposing a child to something in the first round means just giving them a dose of a skill and alllowing them to take from it what they will.
The history topics and science topics and read-alouds are all meant to be exposure in LHFHG. There are skills that are wound within the exposure, but the kiddos are just being introduced to those skills for the first time so we cannot expect them to master them. Rather, they begin getting a bit better as they go, retaining a bit more with each exposure.
With this in mind, I think it also helps to know that the skills wound within the phonics, math, and writing are more important than the skills wound within the history, science, etc. So, with your son doing wellin the "important areas", you should feel good about your progress in LHFHG.
I am inclined not to be a repeater with the same read-aloud material in a curriculum, so I would lean away from repeating LHFHG simply for the purpose of having him gain more from the history readings, science, or read-alouds.
I also think that stopping and starting a program off and on takes away the continuity of learning (and often you'll find that suddenly just when you thought your child was taking very little from what you are doing, the child shares something that shows he/she is gaining much more than you thought). This is because a steady progression of skills each day eventually leads to the lightbulb moments.
So, if you have been in essence doing everything that is written in the LHFHG guide with your son, and he is able to get through it and is successful with the math and the phonics, I would be more likely to advise going to half-speed to finish out LHFHG. This can be done in a myriad of ways, but it will keep your son steadily progressing forward with skills you've spent all year working to build. I would hate to see you stop and miss the fruit that often comes near the end of a guide.
By going half-speed, you would allow your son to grow and mature, yet you would not be changing gears and hampering his progress or simply treading water as you wait for him to mature. You have 12 weeks remaining in LHFHG now, which would be 24 weeks if you did it half speed. That is plenty of time for him to mature before Beyond.
If we wait for our little boys to calm down before we think they're truly listening, you may find yourself waiting a long time!
I know my little boys were a long time in calming down!
Reading on a couch with your arm around your son, keeping him anchored to your side, having him help you hold the book while you read can really make a difference in how focused little ones are. So, if you haven't tried it you may wish to do it!
It works for me. Also, make sure to alternate reading times with active times, so right after reading about the history, hop up and do the rhymes.
Another helpful thing to do is to make sure not to exceed 30 min. of instruction in a row. So, for example you may wish to do 2 boxes from the right side of LHFHG and then take a 30 min. break. Then, do the left side of LHFHG (with all 5 boxes taking about 30 min. all together), and then take another 30 min. break. Then, do the remaining 2 boxes on the right side of LHFHG and at that point, you're done!
One last thing to consider is what your child's optimum leaning time may be. So ponder whether or not your son is morning person and take this into account when you schedule the time to begin his day. Also, take into account the time of day when he is calmer and more focused and the time when he is more wild and use those times to your advantage.
I'd love to hear your thoughts if you get a chance!