I am and secondary English teacher gone home school mom. I think Easy Grammar at http://www.easygrammar.com/ is the best and easiest I've ever used for actual grammar.
We use unit studies for most of our work, even in high school. Far Above Rubies is the unit study my girls are using now. It is a Christian four-year unit study for girls. It involves lots of reading, writing, and creating projects. You can see a sample unit at
Writing can bring English into every subject area and make learning more interesting!
Have you ever wished there was a free workshop called "How to Homeschool High School Without Going Bonkers"? Well, there is, and you are cordially invited to this free class!