There are a few possibilities why you might have this impression:
* The focus of the narrative: The story of "To Kill a Mockingbird" by Harper Lee focuses heavily on the children's perspective, especially in the early chapters. The first day of school is a significant event for them, setting the stage for their interactions with the adult world and the events that unfold later in the story.
* The children's attitude: The children, particularly Scout, are not particularly enthusiastic about school. They find it boring and restrictive, which might make their attendance seem less prominent in the narrative.
* The importance of the first day: The first day of school is a significant event in the novel, as it introduces the children to Boo Radley's presence in their lives and sets the stage for the events that follow.
It's important to remember that the novel focuses on a specific period in the children's lives and highlights the events that are most impactful for their development and understanding of the world around them. While their school attendance might not be explicitly mentioned throughout the entire book, it's safe to assume that they did attend school regularly, as it was a standard part of their lives in Maycomb.