Math Class

I had a really long dream, but I only remember part of it. I just remember being in a math class with my friends from high school. It was an advanced math class, but it was taught by my eighth grade algebra teacher. I remember we were reviewing some basic math concepts (FOIL), as they related to the new material. The strange thing about the dream was that a high school friend that has since passed away was in my class and she was fine. She was happy, smiling, and laughing at the teacher's jokes. I knew in my dream what had happened to her, but I was just glad that she was there. I was wondering why people were doing their math problems instead of talking to her.