We're frequently asked about the teaching of spelling rules and how a spelling program can be effective without teaching spelling
rules. Here's my answer: English spelling has definite
patterns, but these are not easily encapsulated nor understood by simplistic and abstract spelling
rules.
If you want a program that has zero preparation work on your part (but can still be customized, as necessary, to meet the needs of all of your children) and is very quick and painless, definitely go with
AVKO. In our experience, it's not about efficacy per se that really separates out the various Orton-Gillingham-based programs -- all of the O-G methods are effective, especially for
dyslexics. What does separate out the programs is the ease for the parents to teach it, and the students' levels of frustration. When the complicated rules for
spelling are taught, it becomes more of a hassle most of the time. The rules are very abstract, have multiple exceptions, and are not easy to remember. But, most importantly, when rules are taught, and the child tries to apply what he has learned and gets to an exception, he gets even more frustrated than if he had misspelled it after never having studied a supposed-rule to begin with.
In some languages, it makes sense to teach rules. In English, it makes sense to teach
patterns. Being an amalgamation of so many different languages and retaining so much of their original phonics, it becomes very difficult to teach rules that cut across the entire spectrum. So, we don't.
However, we do have materials available on teaching the
spelling patterns that are common (and uncommonly taught) in English. I would recommend that you see our page on Sequential
Spelling (
ss.avko.org) -- on there, there is a link to how to customize your
Sequential Spelling program. This will be of great interest to you, I'm sure.
http://avko.org/Essays/customizing_ss.html