I have used this homeschool curriculum for many years along with the DVDs. The DVDs take a huge load off of me and keep my kids interested and engaged. They have guest speakers, puppet shows, and science experiments that my kids can conduct along with the teacher or just watch. There are plenty of writing assignments and thoughtful discussions.
My kids have always seemed to be bored with the math, however, so we would advance pretty quickly through it. Sometimes I would substitute Saxon math if I felt the it was too easy.
I absolutely love the reading curriculum. They give you an extra reading list of books that complement whatever material they are currently covering.
I feel that the extra expense of the DVDs along with the textbooks is worth it and my kids are getting a great education.