My new chorus teacher

I moved to a new school and I joined the chorus class at this one and compared to my last 2 chorus teachers I low key think this teacher and the class is kinda lazy. Their concert is next week and they barely practice their songs and when they do it’s not good at all I try to follow along but I can’t even hear them. Like when they sing “All I want for Christmas is you” the songs dynamic is mostly forte (which means loud) but when they sing it’s like their whispering I think their kinda embarrassed to sing which I get because that class is small but the teacher doesn’t even motivate them fr nor does he try to call out their mistakes when they sing. I miss my old class I didn’t even get to do the concert with them :( but I will still go to see them perform:)