The Stuttgart school grew quickly, adding a grade each year of secondary education, which thus by the 1923/4 school year included grades 9-12, and adding parallel classes in all grades. By 1926 there were more than 1,000 pupils in 28 classes. Already, in 1922, Steiner had brought his educational ideas to an English-speaking audience when he delivered twelve lectures at Manchester College at the Oxford Conference on the philosophy and practice of education and the imperative for a moral component. This was followed up in 1924 with a course by Steiner for teachers held at Torquay during Steiner's final visit to Britain. Schools founded in the first decade after the Stuttgart school include:  A 1928 attempt to found a Waldorf school in Nuremberg met with resistance from the Bavarian Education Ministry, which stated that there was the "no need in Bavaria for independent schools employing novel ideas, especially when they had no religious ties." The Stuttgart school grew rapidly, opening parallel classes, and by 1938 schools inspired by the original school or its pedagogical principles had been founded in the United States, UK, Switzerland, the Netherlands, Norway, Austria, Hungary, and in other towns in Germany. Political interference from the Nazi regime limited and ultimately closed most Waldorf schools in Europe; the affected schools, including the original school, were reopened after the Second World War. Three-quarters of the Waldorf schools today are located in Europe; schools are now being established in Eastern Europe, where communist regimes forbade Waldorf schools until their overthrow in 1989. In the English-speaking world, there are about 200 schools in the United States, 70 in Australia and New Zealand, 40 in Great Britain, and 30 in Canada; there are also many schools in New Zealand and South Africa. Germany, the United States and the Netherlands have the largest number of schools, while Norway, Switzerland and the Netherlands have the greatest concentration of schools per population. All independent schools in Australia receive partial government funding, including the currently approximately 40 independent Steiner-Waldorf schools. In addition, 10 schools administered by the state are currently operating Steiner programs. In 2006, state-run Steiner schools in Victoria, Australia were challenged by parents and religious experts over concerns that the schools derive from a spiritual system (anthroposophy); parents and administrators, as well as Victorian Department of Education authorities, presented divergent views as to whether spiritual or religious dimensions influence pedagogical practice. If present, these would contravene the secular basis of the public education system.