If your congregation is large enough, I'd suggest a couple of study groups. Bedrock: that would do the basic framework of faith, and Landscape: deepening understanding of the Bible, theology and other topics.
The sessions could be split into 2/3s content and 1/3 questions. Questions and discussion are essential for learning. I'd also have worksheets that people could use to revise (another great way of embedding knowledge). That would build into a handbook. I'd also have a members-only blog for questions and discussion through the week, and I'd put links and other content on it.
Each week we would also encourage participants to learn a topic relevant verse of the Bible.
The formal sessions would run in step with school terms, with the off term sessions recapping the term's content and covering other material.
Twice a year would be either a retreat of one or two nights away or a full day session to explore some areas more intensely.
Here's how the one year Bedrock program might work:
- The Bible: text, context, structure and themes. Treatment of Pentateuch and prophets.
- Person and work of Christ: based on Mark or Luke, but drawing out the theology.
- Church history
- The early church, based on Acts
- Overview of Christian doctrine: based on the Apostles' creed
- What is 'saved': based on Galatians
- Living the life: two units; based on Ephesians and James.
- Arrival: all things new: based on Revelation.
(The names of the terms are based on the Christian calendar and the invented term 'Ecclesia' for 'ordinary time');