The Center for American Progress too has weighed in on the intertwined issues of transforming schools and expanding learning time. Their recent white paper reminds us that there are no silver bullets in education reform, and that it is best to consider how different change initiatives work in tandem. "For more learning time to deliver meaningful results," the authors of the white paper observe, "other key elements and conditions like strong principal leadership, effective teachers, and a culture of excellence must be in place in schools. The success of more time depends on how well it is added and spent."