I find Carrie’s guides work best without cutting too many things out since they are a unit study. I find I can add things to her guides if I don’t add too much or replace if I replace things evenly (for example, my ds did physics with US History I since he’d already finished chemistry - it was an even swap so it didn’t impact time).
That being said, my dd with Down syndrome didn’t do every single activity in LHTH last year, but I did do it as written and 90 percent in entirety. For example, I’m more comfortable teaching a concept with my own teaching. For example, if the lesson is God created light on day 1 with a spoken word and the activity is meant to show that concept - I might (or did) teach the concept in a way that fits my parenting style and how our family approaches education in an attempt to get the Truth of God creating light on day 1. I printed out a day 1 picture and colored it with her while talking about how God spoke and then there was light while He created the world. When my older dd (normal to gifted) did the first part of LHTH, I did do the flashlight activity for God creating light on day 1 because I knew she would love it. I tailor Carrie’s activity ideas to my kids. Does that make sense? I was a teacher for 8 years prior to homeschooling, and I am a teacher at heart…especially tailored teaching to one kid!
With all that said…
I Loved
LHTH for my dd with Down syndrome because it helped me do the letters again which she needed, and I did add to it. I added hands on Lauri numbers and letters which she needed. I also added 2 read aloud books a day from our shelves which she loved. Her favorite part of LHTH was the music and showing my husband her letter and number books with the program that I spiral bound at the start of the year so they stayed together!
With all that said…
My older dd only did 3-4 units because at age 4 she already knew her letters, numbers, colors, could write her name and basic words, and she had heard the Beginner Bible from Genesis to Revelation multiple times. She needed something different to meet her where she was at. All 3 of my oldest learned LHTH material through regular life. However, I did find it delightful once we got 4-5 units into it and I was doing it in its entirety last year. There is a lot of education there for a child who will benefit from Bible overview, numbers, letters, and early skills.
If he squarely places into LHTH, you might be surprised how much he enjoys the simple activities such as the art. My older dd enjoyed helping younger sister with those projects and she was in 8th during it.
I hope something I wrote helps. If Carrie helps you stay on track that is worth so much!
Oh…do a search for my3sons and LHTH…Julie has some great posts from years ago that show the program in action.