Turn one 4-by-8 piece of plywood so the long side is horizontally in front of you. Lay a measuring tape out along the 8-foot span. Make a pencil mark every 2 feet 8 inches to divide the plywood into three sections. Place a long straightedge on the pencil markings and use it as a guide to draw a straight cutting line. Use a scroll or circular saw to cut the plywood into three separate pieces.
Line two of the plywood pieces up equally on the ground, with the 4-foot spans facing vertically. Place one hinge set 6 inches from the bottom and one hinge set 6 inches from the top at the point where both plywood pieces meet. Install the hinges by screwing them into place.
Turn the two attached pieces of plywood over and line up the third piece. Repeat the process of installing the hinges between the two non-attached panels.
Sand down any rough places on the plywood divider and paint with a high-gloss acrylic to create a finished look.
Fold the left and right panels onto the center panel when moving. Spread out the panels folding them outward in either direction until balanced, to set up.