I can only speak from my own personal experience, but for the most part, regular weekly classes are mainly dancing. I will give some background on things or answer questions in more detail orally, but there generally are not handouts week to week. I *do*, however, give out a little syllabus, if you will, at the start of my classes (mainly has my contact info, any pertinent information about the class schedule or class policies that they'll need to know, online resources, and, for the beginner class, some "getting started" tips.) I also have a password protected page on my website where students can log in to see a couple of general handouts, article links, and (late in the session) choreography notes for the piece the class is working on for a hafla, if applicable. I don't generally give homework...well...unless you count off hand remarks like "see if you can practice your shimmies in line at the grocery store this week."
This is more written material than my instructors gave--my dance training was primarily dance and some bit of oral explanation or discussion on occasion. (The majority of reading and lecture I received was through my history major and personal research.) I don't generally, however, require reading etc--I just make it available to the students.
From time to time teach some specialty classes that do actually involve a combination of lecture, coaching, and dance, and that involve the students working toward some kind of goal at the end of the session. In those cases, a.) I set that expectation up front (in the course description), b.) there are usually a few more handouts or resources specific to the class, and c.) I may give "homework"--steps or milestones or activities to help the women keep move toward the final goal.