It was quite quickly realized that the division did not work very well. Over time, high schools responded to students' needs and increasingly offered the arts courses that were essential for the workforce. At the same time, as universities began teaching science and engineering, so did the collegiate institutes. Within a decade, the distinctions between the two systems were greatly blurred, and eventually, the two systems were merged in to a single secondary school system. After the merger of the two systems in Ontario, the terms "Collegiate Institute", "High School", and "Secondary School" were all used synonymously with one another to refer to an institution of secondary education.