Narwhal is a happy-go-lucky narwhal. Jelly is a no-nonsense jellyfish. The two might not have a lot in common, but they do love waffles, parties and adventures.Join Narwhal and Jelly as they become the coolest teachers in the world wide waters in the hilarious sixth book of this blockbuster graphic novel series!Dive into four new stories about Narwhal and Jelly becoming SUBstitute teachers!The two best friends come across an enthusiastic school of fish one morning. Unfortunately, Mr. Blowfish, their teacher, has come down with a cold, and class will have to be cancelled . . . until Professor Knowell (Narwhal) and Super Teacher (Jelly) volunteer to help out!