Nothing like a mouthful of teeth to get your attention! I will teach you Robert J. Lang's Shark as a compound model with a separate set of chompers. This intermediate model uses the bird base and folders should be comfortable with folding inside and outside reverses. And its dentures stay in place without gluing necessary. That's certainly something to chew on!
The Complete Book of Origami by Robert J Lang for the shark body.
Students should bring at least one 10 inch square kami or larger. AND one square sheet 1/3rd the size of the larger sheet and it should be the same color as the larger sheet but MUST be duo colored (the color on one side and white on the other). The smaller duo sheet could be a different color to suggest the gums of the shark's mouth.