The three things Horace Mann advocated were :
1. Mandatory education for all.
2. Public funding for all schools.
3. Most teachers being women.
Horace Mann was an American educational reformer and a promoter of public education and public schools.
He advocated mandatory education for children from all social classes to give the less fortunate an equal opportunity to advance in life. He believed that education was not only about reading and writing but also about learning morals and values. Public education should be paid, controlled and sustained by the public. In his opinion, women were better suited to be teachers and he pushed for a feminization of the teaching profession.