The Textword literature anthologies censor out the naughty bits as well as Christian references. One of them includes a somewhat abridged version of A Tale of Two Cities in which they leave out the part about Jerry Cruncher beating his wife (among other things). I don’t know if they abridge/censor works that aren’t public domain.
Interestingly, it’s not just Jewish schools that use Textword. Many Christian schools do too.