From my experience it is better to test it first with other students. It is difficult for me to give you exact information without knowing your teacher's needs. Please send me your email address.
Most are just afraid of the unknown and see the unknown as a threat to their stabilty. Can one blame them? I think you can blame them. It is the fault of the ones that are scared to improve and learn.
We again connected to the same people and we were wining a little about the fact that we had to share the boat with around seventy other passengers instead of getting a little romantic private tour. | 
