This week on “The Learning Curve,” Cara and Gerard are joined by Daniel Walker Howe, Rhodes Professor of American History Emeritus at Oxford University in England and Professor of History Emeritus at UCLA. Drawing from his Pulitzer Prize-winning book, What Hath God Wrought: The Transformation of America, 1815-1848, he provides background information on Horace Mann, the first secretary of the Massachusetts State Board of Education, founder of the common school movement in public education, and a prominent abolitionist in Congress.