Are you building a greenhouse? It cannot be just learning about one. Your students would be building one. Therefore, they have to learn lots of things before they could. It is a great idea. These are the things you need to have the students learn before building it: how to build, materials needed, tools needed, safety for using tools, the kind of plants you would grows, the care of plants. Also,your students will need to have an Open House. They will need to plan it, learn how to create invitations, flyers, posters to invite family, friends, and community members. You have a lot missing in this first concept map. Sharon Peterson