eFantasmic.com offers literature based curriculum using library books that covers many subjects and topics.  It is created "by homeschoolers for homeschoolers" and, as a former teacher, I think the samples and information look very good.  If you are in a state that requires documentation, this may be an easy way to provide that.  If you are not, the work samples are still great for portfolios and your own documentation.  It looks like they've put a lot of work into this website.  I love the fact that the books are available at the library.  Many curricula have so many supplemental materials that the cost just keeps rising.  I don't know anyone who uses one curriculum exclusively (either they are eclectic homeschoolers or need supplements for some subjects), so the dollars spent can add up quickly.  I believe this is a cost effective curriculum.  There is a one time fee (see the website).  You download and print the sheets yourself, so you can have as many copies as you need.  I am not a great proponent of worksheets, but these lessons contain more than just worksheets.  There are many options for the children you are teaching.  See for yourself, visit www.efantasmic.com .