Answer: Mrs. Walsh
Phil wisely asks a woman in the Tip Top Cafe what high school she went to, who she had for English, and what her teacher's name was. The next day, he meets her at the Groundhog festival at "Gobblers Knob" and says..."Nancy... Nancy Taylor! Lincoln High School. I sat next to you in Mrs. Walsh's English class. Yes, it's true... I was short and I've sprouted."