Naismith moved to Springfield, Massachusetts, to become a physical education instructor at the International YMCA Training School (now Springfield College).

Naismith was assigned to create a new indoor game that could keep students active and engaged during the harsh winter months, mitigating injuries from the more aggressive sports like football.

Naismith devised thirteen basic rules for a new game, emphasizing skill and teamwork over brute force. These rules formed the foundation of what would become basketball.

The first public basketball game was played at Springfield College, with two teams of nine players using peach baskets as hoops. The game was a success, generating excitement and interest.

The first rules of basketball were published in the Springfield College newspaper, "The Triangle", marking the official launch of the new sport to a wider audience.

Naismith actively promoted basketball, writing articles and organizing games to spread its popularity. He observed and revised the rules as needed, continually working to improve the sport.