Students engaging in the lesson

If you view this video, there is a spelling error that I made TWICE - instead of typing voici, I typed voice. I don't know why, I never do that normally. However, when I checked my email the night I posted the lesson, I had many notifications from YouTube that students had commented on my video on my error. Another one also thought that my adjective as the passé composé and asked a question about that as well. All in French!!! When they came in the next day, everyone was excited to talk about my mistake and we discussed whether Madame used the word 'fermé' as an adjective, or was it a past participle?