Schooling became structured around the premise that if teachers provided the correct stimuli, then students would not only learn, but their learning could be measured through observations of student behaviors. The behaviorist movement led to a long series of strategies for schools such as management by objective, outcome-based education, and teacher performance evaluation systems. Behaviorism in schools placed the responsibility for learning directly on the shoulders of teachers. Teachers were led to believe that if learning was not occurring, then it was their responsibility to restructure the environment, determine the most appropriate reinforcement to promote the desired student behavior, or provide a negative reinforcement to extinguish unwanted behaviors.