Well, you probably want a packaged curriculum with lesson plans already laid out, that includes some form of specific grammar and vocabulary training. A good secular curriculum is Calvert, and there are a number of Christian curriculums including Bob Jones (BJU), Christian Liberty Academy (CLASS), Covenant Home Curriculum, etc.
You can view links to these and other curriculums here, but it's even better if you can see them in action, so you might want to check if there are homeschool groups near you (the military bases will probably know). If you do happen to find one, please ask them to submit themselves to our
groups listing!