After 1868 new leadership set Japan on a rapid course of modernization. The Meiji leaders established a public education system to modernize the country. Missions like the Iwakura mission were sent abroad to study the education systems of leading Western countries. They returned with the ideas of decentralization, local school boards, and teacher autonomy. Such ideas and ambitious initial plans, however, proved very difficult to carry out. After some trial and error, a new national education system emerged. As an indication of its success, elementary school enrollments climbed from about 30% percent of the school-age population in the 1870s to more than 90 percent by 1900, despite strong public protest, especially against school fees.