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Similar to mastery learning is Keller plan which has been developed mainly from skinnerrian principles of operant conditioning this approach has been adopted widely. Keller plan combines mastery learning approach with the programmed instruction concepts of learner control self. Pacing and contingency contracting at the beginning of a course students haver a contract agreement with the teacher regarding what work will be done and then they proceed at their own pace and initiation the teacher is available for tutorial assistance or small group discussions thus giving general feedback and guidance. Since this approach depends on the learners to manage their own learning the students should be mature and have self discipline to manage their own learning.