Can someone explain how they use IEW (1A)?

I think I want to do IEW for my third grader, but I am so overwhelmed by it. There are DVDs, Fix It Grammar, somehow they also need to write? I need to know if it is like “on Monday, watch the video. On Tuesday, do these pages. On Wednesday and Thursday, write this.” Or if I’d be spending a ton of time prepping. I work outside of the home two days a week, and I’d love if on one of those days, he could just watch the video with our nanny without a ton of other side quests.