 His educational background and his teaching experiences then proved to be useful to develop his concept for teaching in school, as he founded the " Nationaal Onderwijs Instituut Ampel" or the national college.During the time of colonial social discrimination in the early 20th century, education was only made possible for the elites, the colonial Dutch people and a handful of Javanese noblemen families.Education at that time was not made available for native commoners.