We just started DITHOR for this year, today. We did one unit, Humor, last spring and will be doing more of the genres this year. You can really tailor the amount of reading to your student by the length of book you choose and the amount of time you use it over. For instance, last spring when we did the Humor unit, my dc read the other 2 Frog and Toad books that they hadn't yet read in the Emerging readers and one Minnie and Moo book. So the amount of reading per day was 1 chapter of Frog and Toad, which is about the same amount as in the Emerging Readers. Today we started the genre, Biography, and my dd will be reading the Captive Princess and Amelia Earhart over the 15 days. That is about 20 pages of reading a day, but I wanted to challenge her a bit so I chose longer, higher level reading books. My ds will be reading 2 different biographies of Thomas Edison and reading about 10 pages per day. In both cases, their reading will only be about 15 to 20 minutes per day. The difference between the Emerging Readers and DITHOR would be more in what you do
after you read or sometimes before you read. There is more analysis, discussion and activities that go along with DITHOR.
I really loved the Emerging Readers for their simplicity of use, the ability to get the dc to begin thinking more deeply about what they read, and gradually improving their reading level overall. You might want to look them over and have your dd try doing a few days of it and see if it seems too easy. You can even begin 1/2 way or later through the emerging readers to get to the more challenging books. Even though it was below my dd's reading level when we did them, I thought it was still a benefit to her in helping her think more deeply about what she read and also improve her reading aloud fluency. They were still a stretch for my ds when he started them, but they really helped bring him up in his reading level. So I think they work in different ways at different levels and all of the books are wonderful books!
DITHOR can be done half-speed from what I read. What you would do is schedule the reading over 30 days instead of 15 and only do the activities every other day. I have been considering doing this myself just because of the schedule we have right now. We have 2 days a week when it is difficult for us to get in that extra 20 minutes to a 1/2 hour for DITHOR so I have been considering just having those be independent reading days. After looking over my material for DITHOR though, I think we'll be able to go full speed with no problems since there are only about 3 activities a week which take much more time than just the reading. You might want to take a look at the DITHOR sample:
http://www.heartofdakota.com/pdf/d1.pdf. You would only be doing the level 2/3 activities. So that can give you an idea of what is involved each day in DITHOR.
Hope that helps give you some ideas to ponder.
