hey guys im curently teaching an elderly couple to sail .. one has dimentia and the other is realy stupid .. does anny one know anny online sites that could help them learn to stear in A STRAIGHT LINE or mabey RAP THE ROPE AROUND THE WINCH THE RIGHT WAY .
thankyou
Don't know about online sites for help... why don't you just leave the boat on it's mooring (or trailer) and tell them they're doing a great job!! 
Just remember Nick, we were all young and stupid once, and we will ALL be old and stupid at some stage.
It just takes care and patience, and if you don't have that, don't volunteer.
A quick Google search generated
www.animations.physics.unsw.edu.au/jw/sailing.html
Or
www.learntosailnow.com/?gclid=CPCO-Yvbi50CFQyA3godNQXY1g but of course not many people will give you information for free out there.
Michael
This might help... "An organisation facilitating sailing for everyone, regardless of age or ability."
www.sailability.org/
