How do I make an igloo for a school project?

I would begin by cutting 2-foot square blocks of ice, then stacking them in a circular pattern, leaving an opening for a door way toward the north. A clear block of ice will work nicely for a window or Windows, to let some light in. A small hole at the top (6 inches wide) will allow smoke and heat to escape, rather than be trapped inside with you. The covered entrance way should have a sharp angle, to prevent the wind from driving directly into the ice house. An axe will do all of this work nicely.