Clase de Español

I had to delete the original post for this photo and date because something happened to my computer on Monday evening, February 4) a computer voodoo, I think!) that recorded the number of visitors but was not recording all of the comments. So, I've reposted the photo of my Spanish teacher who is trying to clarify the correct use of the confusing (for me) estar and ser. Sorry, but I consequently lost the four comments that originally posted before the glitch occurred.