I was very interested in your description of the experience and how things are reversed after a few generations. In the past, people often spoke French at home and English at school. These days, for a lot of francophones in minority situations, it's the opposite because families are exogamous or even because of isolation. They are more mobile than before. So people are speaking French at school and, at home, the universe is anglophone.
I live in Toronto, a city where there are a lot of francophones scattered about. The francophone community doesn't have a place to gather together, like a community centre. So it's difficult for kids to have access to this transmission of the French culture and language.
Can you describe how the program with high school kids works? What are they learning? Does the program involve grandparents or seniors in general?