We start August 12. I am the type that starts full-steam-ahead! If we started slowly, the temptation would be there to STAY slow/easy... and I don't want that. This year, we are going to do 5-6 weeks of LOTS of school work, followed by 1 week totally off, rather than week after week after week of a medium amount.
For my oldest (5th grade) we're studying U.S. history in the early 1800s - up to and including Lincoln, but not going into the Civil War until mid to late September. So we are starting with westward pioneers, the gold rush, that sort of thing.
For all three, we are doing the Further Up & Further In study of the Narnia books. We've been reading TLTW&TW this summer and will be starting TMN when we start school, so lots of days we'll have an activity or two that goes along with those books.
In addition to that, they have their math, reading, etc - regular stuff.
We are finishing up the French and Indian War and Ecosystems. Those are the "unit" topics on top of the usual- math, spelling, language arts (mostly tied into the unit topics we are learning about), and some handwriting practice.
For the 2 and 4 year old we are working on ABC's a little handwritting practice (or pre-handwritting practice things) and reading a lot of stories about babies.