Wow, some of you take so much stuff. I bring to class what is usually listed on the paperwork for the class.
Usually it is just a ruler (with my name on masking tape on it!)
My rotary cutter (also named)
A small cutting mat
The required yardage of fabric, thread, pen or pencil and paper and my sewing machine. Most importantly I make sure to remember the power cord and foot pedal for my machine! I like to travel as minimalist as possible and have never had to borrow anything from someone else at a class.