To start my card, I cut two pieces of blue cardstock 8 1/2" x 5 1/2". One piece is scored at 4 1/4". This will be the outside of the card. On the side that would be the front, I cut a window 1" from each of the four sides.
Apply adhesive to the back side of the inner panel and glue to the inside of the outer panel. I have found that liquid glue works best for this. It allows a little bit of time for you to line up the panels perfectly. The "lever" should fit nicely in the window. If it's a too-tight fit, you can trim just a bit off the top and bottom of the "lever."
On the remaining narrow strip, cut in 1" from the right side, 7/8" from the top and 7/8" from the bottom; then make a vertical cut between those two cuts. Glue this to the left panel of the inside of the card.
On the fourth strip of patterned paper, cut in 1 1/8" from the left side, 7/8" from the top and bottom. Cut down from the top and up from the bottom to cut off the excess. This piece will cover the "lever" section of the card.
After completed, here again is my lever card.