D.H.
I live in Auburn, which is next to Dacula. I can help you a bit. I do surveys in new subdivisions (I note the progress each quarter.) in Dacula. Anyway, the Dacula schools are good schools, especially the Mill Creek schools from what I hear. The VP and a teacher at Dacula Elementary go to our church in Winder....I know them, but can't really tell you too much about the school itself.
If you were to live in Apalachee Station, you would be zoned for Dacula schools (elementary, middle and high school). Some areas in Hamilton Mill, depending on where you are at will have Dacula schools or Mill Creek schools.
If you are looking in several different types of new neighborhoods, you can look at this website to find more information about schools for particular neighborhoods, etc. www.atlantanewhomesdirectory.com
I hope this helped a bit.