Many changes occur in the world of education as a result of technological advancement, including the compilation of a module. Digital modules
that students can easily access and that have been compiled based on an analysis
of student learning obstacles are required. Therefore, this research aims to develop a digital module based on student learning obstacles and it employs the
theory of Digital Didactical Design (DDD). DDD contains components of learning objectives, learning activities, process-based assessment, social relations, and
integrated technology. This is an on-going study relying on ADDIE (Analyze,
Design, Development, Implement, Evaluation) model and it reveals the results
from Analyze, Design, and Development stages. In the analysis stage, several
instruments, such as test, interviews, and documentation, were used to encounter
some learning obstacles in solving the combination problems faced by the vocational high school students. The next stage is designing the digital module based
on the students' learning obstacles using DDD components. And in the development stage, the validity and practicality of the module are being tested and the
results are very valid and practical. Thus, this digital module was feasible and
can be used in teaching combination for vocational high school students to minimize learning obstacles.
Keywords—combinatorics, digital didactical design, digital module, learning
obstacle, vocational high school students