Complex sentence: At one point in seventh grade he has to make do with women's shoes that are much too small for him, until the school principal, Mr. Jenkins, buys him new ones, carefully scuffing them first to make them appear used.
Split into simpler sentences: At one point in seventh grade he has to make do with women's shoes that are much too small for him. The school principal, Mr. Jenkins, buys him new ones, carefully scuffing them first to make them appear used.