In reply to MattH: The Outdoor Education Advisors Panel produce a set of Outdoor Learning Cards, which are essentially teaching aids for teachers.
Your son's school's Outdoor Education Advisor will be listed at www.oeap.info and your son's school could get in touch with them. In that way, the teachers involved in the after school club could receive some training and resources to use.
If any kids wish to take it further, then there is the the BMC Climbing Wall Essentials DVD, and a range of videos on our site looking at tying on, belaying, warming up and climbing movement.
Finally, the Warm Up poster is free form our online shop. It's another useful teaching aid to get the kids in good habits from the outset.
Jon Garside