Our charter has a great bi-weekly writing workshop. Every other week, DS and the other children take turns sharing their work. After each student shares, the others go around the circle telling the author specifically what they liked about it or ask questions about it. It really builds self-esteem in a fun way, and my DS (who was 5 this year) loved sharing with the older kids!
This has worked so well that our co-op (several families from the charter who get together once a week) has started using it in a lot of our share activities. Often the topics are open-ended, like "favorite homeschool project," so the kids are excited about what they're sharing. It's very low-key, but again gets them speaking and reacting on their feet in front of peers.
