Cut the shelf frame boards to size and drill 3/4" pocket holes at both ends of the top and bottom pieces. Attach the boards together with 1 1/4" pocket hole screws and wood glue.
Cut the back cleats to size and drill 3/4" pocket holes at both ends. Attach them to the back of the frame with 1 1/4" pocket hole screws and wood glue. The pocket holes should face the back of the frame and be flush with the back of the frame.
Cut the shelf boards to size and drill 3/4" pocket holes at both ends. Attach them to the inside of the shelf frame with 1 1/4" pocket hole screws and wood glue. The back of the shelf boards should be flush with the back of the frame.
Cut the front cleats to size and attach them to the inside of the front of the frame with 1 1/4" brad nails and wood glue. They should be attach 3/4" from the top and bottom frame boards and flush with the front of the frame.