How about a chair made from a 10' 2x6? The seat is 40" long. The backrest, 48" and the wedge-shaped bits are 11-1/2" long. Join the wedge pieces to the seat and back rest with 3/8" dia. dowels. That should give you enough to go on. Don't worry about materials or adding a sketchy style unless you want to play.
Teacher could use another apple, too. Or better, a donut.