One of the problems in e-learning, as stated in the constructivism theory is to manage the diverse experience levels of students. These varying levels have to be taken into account in designing learning models due to its significant impact on the e-learning system effectiveness. This paper proposed a new instructional design model applied to a website for learning programming language. This model is based on a theoretical foundation of constructivism emphasizing on the learner rather than the instructor. Thus students learn by fitting new information together with what they already had known. The proposed constructivist-based model is composed of five generic processes; it uses a statistical approach to determine the most likely best-suited way to present learning concepts for students with different levels of experience. To overcome out-of-date statistical data, this paper also proposed an adaptive version that can handle students' feedback to adapt accordingly.