One curriculum that is definitely clicking this year is the Language Arts subject from Moving Beyond the Page. I'm using the Ages 10-12 package for the fifth grader and the Ages 8-10 package for the third grader and they seem to be a perfect fit. Based on an n of 1 for each package I can say I'm enjoying them as much as the boys.
The older boy finished reading The Wanderer by Sharon Creech, a story about 13-year-old Sophie, her cousins, and her uncles sailing across the Atlantic Ocean. Told through journal entries of Sophie and her cousin Cody, we saw the challenges they faced and their development from the experiences. One thing I liked in both workbooks was the book-long recording of a particular topic. For The Wanderer the focus was on Sophie's and Cody's character development during their journey. There were also a lot of other fun lessons focusing on storytelling, grammar, and writing. Then there were the subtle mysteries just below the surface, resolving nicely at the end of the story. I'd say this was appropriate for the fifth-grade level.
The variety of the lessons in the accompanying workbooks was the high point for us. Since I'm not using the other subjects I can't comment on how well the other curricula offered tie in with this subject, but it's apparent from the way they approach Language Arts (and the books selected) that there is a perfect opportunity to tie other subjects in with these books. A caveat: because I felt Language Arts was the area I didn't cover best with the boys last year I really wanted to focus on it this school year. While the Language Arts package appears to cover areas of the topic well (including grammar, spelling, etc.), I'm going to supplement the curriculum with another one. It has nothing to do with any perceived shortfall on MBtP but reflects the additional emphasis I'm placing on this subject this year. The cost of the packages can be pricey, but it's nice that there are several options based on whether you can provide the books yourself as well as choosing e-copies vs. physical workbooks. Also to keep in mind is that the pricing is for the full year. We've been very happy campers so far, admittedly early on, and plan to update and post on the books as we go along…especially since I'm looking forward to all the books we'll be reading together!