The characteristic of the Direct-Instruction system, which depends on the ability of the teacher's reflection, only provides little opportunity for students to be actively involved in the learning process. This process contrasts with the characteristics of the Software Modeling course which ideally emphasizes student-centered learning. The impact of the learning process becomes ineffective, and students cannot reach the minimum competency standards planned in the learning design. We propose a model of integrating Problem-Based Learning (PBL) into the Learning Modeling Software design on three elements of the learning system namely Elementary Curriculum, emphasizing the use of problems as the starting point of student learning; Element Group, emphasizing collaboration systems (group discussion based learning); and Student Elements, emphasizing the Student-Directed-Learning (SDL) system. We tested the effectiveness of the PBL model in small group trials in learning situations that resembled the actual situation and found PBL effectively increased student mastery of a particular topic. However, further discussions regarding 1) how many guidelines are needed in PBL; 2) potential student experience confusion if there is not enough initial learning framework; 3) students who do not have adequate initial knowledge and tend to experience underdevelopment, are still needed to find PBL models that are genuinely effective in learning the field of Software Engineering.

The Conventional instructional design methods using teacher-centered learning approaches provide few opportunities for students to be actively involved during the learning process. This process is not relevant to the characteristics of the Software Modeling course which ideally emphasizes student-centered learning. As a result, instructors cannot control the learning system efficiently, so students cannot reach the minimum competency standards planned in the learning design. In this work, we propose an instructional design model that integrates Problem-Based Learning (PBL) into the instructional deign of Software Modeling course. Three main elements of the PBL learning system model are proposed, namely: Elementary Curriculum that emphasizes the use of problems as the starting point of student learning; Element Group that emphasizes collaboration systems (group discussion-based learning); and Student Elements that emphasizes the Student-Directed Learning (SDL) system. The three main elements of PBL are applied thoroughly and proportionally to each particular learning topic in Software Modeling course. This concept is different from PBL concepts which have been widely applied as learning models, which do not apply the three main PBL elements to each learning topic. This concept is also designed to improve the weaknesses of the PBL model which only places individual learning in small portions, or even none at all. This research uses the Research and Development (R&D) method which consists of three main stages, namely: analysis of system requirements, system development, and formative evaluation. In formative evaluation we do the expert validation, one-to-one student evaluations, and small group evaluation to test the effectiveness of the system. The result of expert validation (related to content, instructional design, and media design) shows that the instructional media product based on PBL that is developed is very suitable to be used as a learning resource, with an average validation percentage of 83.2%. The students' responses to the one-to-one student evaluation and small group trials show that the instructional design products that are developed are feasible to make student actively involved during the learning process, with an average value (related to product display, Usability, and benefits aspects) reach 82.6%. The average level of mastery of students on certain topics reaches more than 96%.

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The Direct-Instruction model which is still widely used in the learning of software modeling in higher education places more emphasis on classroom interactions initiated by the teacher. Generally, it only involves a small portion of student-to-student interaction. The direct learning systems that depend on the reflection ability of instructors only provide few opportunities for students to be actively involved in the learning process. Thus, it is different from software modeling which emphasizes Student-Centered Learning. Consequently, learning becomes ineffective and students cannot reach the minimum competency standard stated in the learning design. This paper proposes a Problem-Based Learning model that is integrated in software modeling learning at three segments: Curriculum segment, emphasizing the use of problems as the starting point of student learning; group segment, emphasizing collaboration systems (group discussion-based-learning); and student segment, stressing the Student-Directed Learning (SDL) system. The effectiveness test results show that the application of the PBL model in 3 segments (Curriculum, Individual, Group) in the learning design of Software Modeling, is effective in increasing the level of student mastery of a particular topic.