I teach third but I think one idea that I've done in the past might be something your 2nds might like.
In the past I have spent my first week doing no textbook curriculum, and instead supplementing with different ways to learn about each other IN the subject areas. So basically, I teach a LOT of procedure that first week and, to begin practicing and understanding our academic schedule, we'll do math during math and spelling during spelling, but it will be math about US, spelling about US, etc.
my morning work the first week would be a variety of interest inventories, surveys, and other things they could do at their seats independently, because that is how morning work would go and they needed to show me they could work that way, but we wouldn't be doing our normal morning work experience.
my math the first week would be creating and reading bar graphs about the class (our favorite pets, our favorite colors etc), taking different numbers about us (our birthdates, for example) and doing math problems with them, maybe doing super-basic fraction problems with m&ms, and whatnot.
my spelling words for the first week would be all of our names including mine
so on and so forth!