Enables learners to learn systematically as a stage. Study on the flow of the lesson content. When did not understand the content can go back to review the lesson then the next content.
Helps students learn a systematic process is in the order of the lessons learned when they do not understand, then to be able to review the following content.
Help students learn systematically a step. study respectively content lessons. when may not understand the content can be to review and then learn the content.