Dean listens to the student's reply, pretty well done. He was alright, and ready to go.
"Well done kid, that was well done. Now, I will be explaining the jutsu, you perform it and give me at least two advantages and disadvantages and how you can use it in battle. Also, if you have questions, ask!
Okay, now for the very first jutsu of Water, I want you to manipulate that water source and create small waves of Water by manipulating it with your Water based chakra, you can also create shields made of water without using the Water source. Try it out, it's fairly easy to do. Explain it to me in as much detail as you can."
Dean walks over to a nearby lake, pointing over to it as he talks to his student.