The main objective of this research is to adopt SCORM SSS (Simple Sequence Specification) standard to develop an adaptive learning system and to access its effectiveness for adaptive learning. The dependent variable of this research is the learners¡¦ learning outcomes, including three constructs that are the learning performance, satisfaction and learning efficiency. The subjects of this research are two classes with total of 61 students in the fifth grade of elementary school, the experiment group has 31 students, and the control group has 30 students. Experiment learning topic is decimal division in mathematics of primary school. The learning materials are designed by a professional teacher in the field of mathematics domain. The concept map and instructional flow chart were used to guide the content design. The result has found that the adaptive learning not only has the same level of learning performance, but also has a higher learning efficiency comparing with the traditional learning. The contributions of this research are; to provide an exemplification of how to design an adaptive learning course using SCORM SSS compliant LMS; to show the advantage that learners don¡¦t have to strict on a fixed learning path like in a traditional courses; and to demonstrate the potential for those competent students who can use less time to complete normal tasks and hence get chances to explore more in depth knowledge.