Complex sentence: Mariotti gained insight into motivating, troubled, economically at-risk students by teaching them how to start and operate a small business, which led to creating a program to bring entrepreneurial education to low-income youth.
Split into simpler sentences: Mariotti gained insight into how to motivate his troubled, economically at-risk students, which was to teach them how to start and operate their own small businesses. His perceptions led to creating a program curriculum to bring entrepreneurial education to low-income youth.