Roger,
I agree with you-interaction requires a special enviroment which should be created by teacher and later developed together with students. It is much more difficult to do online than on classroom phase. Roger, I still remember the action with kangaroo in the classroom in Sibiu..."Do not throw the kangaroo!"-it means for me "Be prepared for unexpected situations which you could created by youself!". You must find the way how to solve (and quickly, especially on line) a new problem:)
Izolda