Why was the school started by its founder?

The correct answer highlights the founder's primary motivation for starting the school, which was to provide an environment that catered specifically to his own children. This suggests that the founder had a personal interest in ensuring that his children received an education that aligned with their unique needs or desires, distinct from conventional schooling. Keeping his children away from what he perceived as 'ordinary' influences or educational methods indicates a focus on customized educational experiences that he felt were necessary for their growth and development.

The other options, while they might seem plausible, do not encapsulate the founder's personal motivations as effectively. For example, the notion of offering better education for gifted children suggests a broader and more generalized purpose that isn't necessarily tied directly to the founder's familial motivations. Similarly, creating a model for new teaching methods implies a focus on innovation in education rather than a personal agenda. The idea of opening a school specifically for gifted athletes is yet another specialization that does not connect to the founder’s specific intent to prioritize his children's educational experience.