Cory, Shawn and Topanga all claim to have been in high school 15 years earlier. However, they graduated from John Adams High School in Graduation (1998) in 1998, 17 years earlier. However, if it weren't for the two year timeskip that took place in between seasons 3 & 4 of Boy Meets World, Cory, Shawn and Topanga would have graduated high school in the year 2000.