This looks really cool! I've just about decided that unit studies are going to be the way to go for my Aspie DD10 (almost 11). It will offer her a lot more flexibility in her schooling and allow her to have more creative outlets for displaying her knowledge. We've been doing SOS for the past few months (we didn't start hs until mid March). She likes the computer part of it, but still gets frustrated really easily and just gives up.
Ellester, what subjects did the American Girls study cover? The website doesn't say

Obviously, it will cover history and reading. What else?
It actually covers quite a bit. The "Master Overview of Skills and Content" includes:
Social Studies -Rev. War era, history & culture of N. Mexico, Pioneers, Civil War/underground railroad, suffrage, the Depression, WWII
Science - Medicine(then & now), animal classifications, desert habitats, nature journaling, tornadoes, constellations, scientists & inventors, nutrition
Biography - George Washington, Betsy Ross, Lincoln, Edison, Wright Bros., Susan B. Anthony
Geography- 13 original colonies, regions of the US, European countries and routes to America, 50 states, map skills
Math reinforcement- geometric shapes & patterns, symmetry, literature based word problems, drills
Character education - qualities of a good friend, honestly, working together, reciprocity, cooperation, allies vs. enemies
Language arts- dictionary skills, literature, grammar & usage, general writing skills, creative writing, journalism and newspaper writing
The book recommends supplementing with math, phonics for new readers only, possibly for spelling, and probably not for grammar.
We supplemented with math, Bible, spelling, art(although there was lots of art in the study), handwriting, and an analogy work book I had.