Kids love putting this together. We push back the desks to make a big open area on the floor and sit in a big circle, then put out one piece at a time and place it. Throughout the entire process I am reviewing latitude, longitude, hemispheres, continent and ocean names and cardinal/intermediate directions. We use yarn for the Prime Meridian and Equator and index cards with the names for the Oceans.
Then we use unifix cubes to mark all the spots they are responsible for knowing: VA, USA, Egypt, China, etc. etc. It takes teamwork! Kids who are participating well earn the right to place the pieces. Lots of motivation there! Everyone wants to help!
The pieces were done with big colored poster board. They are not laminated but have held up through the years. Using an old opaque projector is the way to go and this would be a great job for a parent volunteer!