|Online Appearance?||Yes (as Ms. Flowers)|
The Last Straw
Nurse Powell is first mentioned when Greg sorts his dirty clothes into one pile that he can wear again and one pile that would get him sent to her office for a lecture on hygiene. During the Valentine's Dance, Nurse Powell and the school guidance counselor, Mr. Phillips, walk to the center of the gym and start dancing in the hopes of encouraging the students to join them, though they only guarantee that everyone stays in their seats.
The Ugly Truth
Nurse Powell teaches a class called "The Facts of Life", which is supposed to cover several (presumably sexual) topics in depth. On the first day of the class, she sends the kids whose parents refused to allow them in the class to the library and ends up confusing most of the students during the following lesson.
During the class, Nurse Powell assigns everyone a project where they must keep an egg safe for twenty-four hours. The next day, she walks around to grade everyone and is unimpressed with Greg, whose egg was cooked by Susan Heffley. She congratulates everyone who kept their eggs safe overnight, collects the eggs, and throws them out, which sends Rowley Jefferson and all the girls into hysterics.
Nurse Powell is indirectly mentioned after several students who are addicted to an energy drink called Rowdy Riot go down to her office due to withdrawal symptoms after the schools bans them.
In the online book, her role is mostly replaced by Ms. Flowers and teaches a class called "Reproductive Heath unit".