It's quite a task to pack for class. It usually takes 3 trips to load up everything. LOL!
I use a double-sided tackle box. It sits next to my machine at home. It travels easily with the locked tabs. I like to see the items and not have to check pockets here and there. This always has bobbins ready, marker, tweezers, small scissors and packs of needles. The bottom layer holds the ruffler foot, q-tips, tapes, and threads.
The only items not in the box are the rotary cutter, mats, or rulers. Those go into the large tote bag.