McNorton underwent surgery Wednesday and will return to school this fall.
Students say they wanted to do something special to honor him.
"He's a man of great character and he's very involved in our community," said William Boeh, a student at Troy.
"Everybody needs support when they're going through something so you might as well support them in any way that you can," added Claire Marriott, who also attends Troy high.
The school chose purple because it's McNorton's favorite color.
It's also the color's of his alma mater, Kansas State University.
School leaders say they want to support him in any way they can.
"We're a very close knit school, a very close knit community and we support each other," said Jared Wigger, principal at Troy High School.
They say since being diagnosed, his spirit and personality has never been down.
"He still has that smile on his face he doesn't let it affect him at all. He's still cheery and tells those jokes and doesn't really let it bother him," added Boeh.
McNorton may be the cool teacher in school, but students say his jokes were far from perfect.
Students says he goes above and beyond to make his students enjoy science.
"Man, they're just random that's for sure. You don't expect them to come, they just bring a smile to your face," said Boeh.
The school plans to honor McNorton with a special volleyball tournament March 28th.
Entry fees for the co-ed volleyball game is $100 per team.
To learn more or to sign up for the tournament, call Julie Warner at (785) 850-1208.