There is some wonderful curriculum out that - a many of those may fit in with your parish. There is also some that I would not recommend to an Episcopal church. If you haven't already look at the "choosing your curriculm" page, please do so now.
The Episcopal Curriculum
There is no one "Episcopal Curriculum," other than the Catechism found in the back of the Book of Common Prayer. There are, however, some great curricula out there. One thing to remember when you chose a curriculum is that there is nothing completely "plug and play" - everything needs to be tweaked for the community.
Beyond Traditional Education
Many parishes are realizing that traditional "Sunday School" no longer works for their church. That's ok! There are ways to form Christians without a traditional classroom. Click here to read about formation beyond the tradition.
Curriculum publish by the Episcopal Church (no cost to download and use)
Lesson Plans that Work is the one curriculum that I would recommend to everyone. It's free and downloadable (meaning you can print it out), it's Episcopal, and it's written by clergy and trained catechists (Christian teachers).
Episcopal Bible Study is one of their companion pieces. This is also free and download. It can be used with groups for discussion, by individuals, and as a companion piece to a weekly bulletin or newsletter.
Sermons that Work is the another companion piece. These are actual written out sermons. I think it was begun for parishes that don't always have weekly clergy or trained homilsts. But it can also be used for group or individual study.
Bulletin Inserts, the last piece in this group, is topical where the other three are lectionary based. Again, use them with groups for discussion, as information sharing, or as part of your newsletter.
Recommendated Publishing Houses