Yes, I asked already but they've not allowed me. They said it's too expensive. So, I think I'm better to find a way to get it 1 by myself for my own class ( I've my own class at my house to teaching my students as part time jobs). I need to teaching them in the way that I think they could get more knowledge than just learning from book. I want to make them feels enjoyed to learning with me like the way I feel when I learn by myself from Internet.