I use a tote that was marketed as a "gardner's tote". It has 8 outside pockets and a large roomy space inside. I keep the outside pockets stocked with all my tools, marking pens, rotary cutters, scissors, extra thread, etc. I can see everything in the pockets at a glance. Inside, I keep an extension cord and power strip. When I'm ready to go to a class, I add the current project (and sometimes rulers) to the bag and I'm ready to go.