* Reduced Interaction with Boo Radley: The proximity of the schoolhouse to the Radley Place allows for crucial events like Jem losing his pants in the Radley yard, the children finding the gifts Boo leaves behind, and Scout's encounter with Boo at the end of the novel. Without this close proximity, these interactions would likely be non-existent or drastically altered. The children's fascination with Boo, the mystery surrounding him, and the eventual understanding of his character would likely be diminished.
* Lessened Sense of Fear and Intrigue: The schoolhouse's proximity to the Radley Place creates a constant sense of fear and mystery for the children. The stories about Boo, the creepy atmosphere surrounding the house, and the children's constant vigilance all stem from this proximity. If the schoolhouse were farther away, this sense of fear and intrigue would be less potent, potentially leading to a different tone and mood for the entire story.
* Changed Character Development: The children's fascination with Boo and their interactions with him are crucial for their development. Jem's gradual understanding of Boo's humanity, Scout's evolving view of him, and the children's realization that Boo is a victim of prejudice are all directly linked to their proximity to the Radley Place. Without these experiences, their character development would likely be different.
* Limited Exploration of Prejudice and Isolation: The story uses the Radley family as a symbol of societal prejudice and isolation. The children's interactions with Boo, their understanding of his situation, and their empathy for him offer a powerful commentary on these themes. If the schoolhouse were farther away, these themes might not be explored as deeply or effectively.
* Differing Climax: The climax of the novel hinges on Boo Radley's intervention to protect the children from Bob Ewell. This intervention is directly connected to the children's previous interactions with Boo, their familiarity with the Radley Place, and their understanding of Boo's character. Without this proximity, the climax might be different, potentially focusing on other events or lacking the powerful symbolism of Boo's heroism.
Ultimately, the schoolhouse's proximity to the Radley Place is essential to the structure and meaning of "To Kill a Mockingbird." The story's themes, characters, and overall message are profoundly influenced by this crucial setting detail.