Every summer Discovery runs a week of programming all about sharks. They call it Shark Week and it usually has some interesting content even if it is a bit sensationalized. That said, I my daughters won’t be watching it with me and I don’t recommend it for other young children. But if you are looking for a video about sharks for young students, SciShow Kids offers Super Sharks!
Super Sharks! is a video for kids that explains the unique elements of a shark’s body including cartilage skeletons, why some sharks will have thousands of teeth during their lives, and what a shark’s skin feels like. The video also teaches students about the largest sharks (whale shark) and smallest sharks (dwarf lantern shark) in the oceans.
On a related note, my youngest daughter’s favorite book at the moment is Good Night Sharks. She wants it read to her every night.