What is the fine-grained topic of the following text: When executives at the Australian software company Atlassian came up with the concept of a FedEx Day, during which employees would be given free rein to invent and deliver new products, they probably didn't envision the impact it would have on a sixth grade classroom in suburban Chicago. Only return the topic.
Implementation of Atlassian's FedEx Day concept in a sixth grade classroom in suburban Chicago.