Students and staff are back in class for almost a week now, and some of the long standing concerns are still top of mind. Ryan Lutes was elected president of the Nova Scotia Teachers Union (NSTU) earlier this year. And he says he's concerned with air quality issues in some Nova Scotia classrooms. It's something that has been raised by the previous executive dating back to March of 2020 in the early days of the pandemic. He also speaks to some of the concerns over staffing with a shortage on substitute teachers in particular. And again, this was something that was an issue that only has gotten worse in the last two years.