Another "teaching point" (the best teaching occurs in-context):

Early beginner trips tend to have a fair bit of time available in the late afternoon and evening. For trips where one or more people haven’t purchased all of their gear yet, it can be both helpful and fun/interesting to ask for someone to volunteer to lay out their gear and gather around to discuss it. The point isn’t to critique their gear selections in a negative way (!), but just to foster discussion. For just a selection of gear items, ask why they selected a particular item, what trade-offs they considered. Ask if they have an idea of the weight & cost. Ask how they like it, and if they were starting again whether they would buy the same item.
Make sure this is a group discussion and not just you talking.