it depends on your preference. I usually try to pick a
movement/style/technique/artist that best exhibits the objectives of the lesson to be taught. You
may want to group your lessons by design elements and principles. I strongly
encourage you to start with drawing and work your way up from there. The kids
will have better command of techniques and materials and you can make the skills
develop and grow from previous assignments this way. ...
just my thoughts...hope this helps
Christine in Binghamton