I just trained a floral design assistant, for the hell of it. I bought a used copy of "The Art of Floral Design" by Norah Hunter on Amazon and "The AIFD Guide to Floral Design" for reference. Every week I assigned several chapters of the Hunter's Book to read. In the back of the chapter's there are vocab and questions about the chapter that I expected written answers to the vocab and questions.. We had sit down before each class and discussed the previous chapter. I also have a box of flower pictures on flash cards that she was to study. Each week I had her name the flowers and greens in the cooler, both common and latin. There was hands on such as processing flowers, care and handling, taking an order, soaking oasis, etc. Simple design techniques, I made a simple arrangement and expected her to follow along and duplicate the arrangement. I taught knife holding, prepping the container with oasis, insertion and placement. The book helped teach theory, principles of design which was a good review for me. I also believe teaching theory is very important part of learning the mechanics of good design.