We do our own thing. I use SOTW as a reference book, as well as books from the library and our massive personal library. I look at lesson plans online for ideas if I run dry, and we use a lot of history.com videos, brainpop, biography.com, etc. For second grade (which is this current year for us), we spent the first semester in ancient history, picking up where we left off last year (and I don't honestly remember where that was) and ending with the fall of the Roman Empire. (So, 2nd semester of 1st grade and 1st semester of 2nd grade, we covered ancient history from the beginning of time through the end of the Romans.) Now second semester, we are focusing on American History, starting with a review of the Constitution and covering the War of 1812 and probably continuing through Reconstruction.
I like SOTW, but I don't personally find it to be enough on its own, and plus I prefer a strong American history content, so we spend half of every year on the US, and half of every year on the rest of the world.