The Simpsons Episode 2.19 Lisa's Substitute

When Lisa's teacher Miss Hoover gets Lyme Disease, Mr. Bergstrom takes over the class. Lisa finds Mr. Bergstrom's teaching methods incredibly inspiring and discovers an entirely new love for learning. When Miss Hoover returns to her class, Lisa is devastated to lose her most positive grown-up role model. Eventually, she realizes that while Mr. Bergstrom was one of a kind, she can find role models in other people, including her own father.