I've come to like kits. In the beginning, I wanted to make all my own choices. As many classes as I've taken, I realize, even though I think I've got the supply list covered, what I have won't work. One time I had 6 large totes full of fabrick (a 5 day class) and still had to buy some more.
Then I took a class that called for 1 piece of axb size this kind of paper, 1 pice cxd size this kind of paper, 1 piece exf parchment, 1 piece gxh size freezer paper, many tools unique to this project, and on and on, To get all these things whould have cost $200-300 and some of it wasn't available in my neck of the woods or within 200 miles, so I'd have to order it. Many things I'd never heard of. And I didn't know if I'd ever want to try this again. A kit would have solved these problems.
Many instructors have had try-out type of tools and the same tool for sale.
I've also learned to state in the supply list requiremets for sewing machines (I don't have the skills, knowledge or time to help you during class. Have your machine serviced before coming to class and spend 30 minutes sewing on it before class). And supplies for class (Because the class time allotted is limited, all students will be challenging themselves to stay on task so they can complete as much as possible. Please have all supplies ready, I will not have time to help you gather supplies. Any questions I'd be glad to answer before class. When you're purchasing your supplies, you may text me for advice.)