I think there are very different teaching situations from country to country so I am trying to make it light and easy, without too many restrictions.
What I am still pondering about is, wether there should be a "finish line" or not. Some schools seem to have yearly class contracts so it is difficult for them to go beyond the time there. However the school years start at different times from country to country; it will be disappointing for the students to be told "no more video letters" all of a sudden, so I guess that a clear timeline would be better.
If you write me, please add some comments on what you think here.
Thanks a lot.