AbstractLinking summative and formative assessments to improve the learning process remains an important issue, as there is very few research to address on this topic. The research aims to produce a valid mathematical modeling process student worksheet to integrate instruction, assessment, and learning. This research employed a development research approach, consisting of four stages of the modified ADDIE model: analysis, design, development, and implementation. The analysis step involved analyzing real-world situations, instruction, assessment, learning and the characteristics and principles of applied mathematical modeling problems. The analysis step focused on creating the design and product, while the development stage included an expert review. The implementation step utilized a formative evaluation approach consisting of self-evaluation, one-on-one interview, and field testing. However, the small-group evaluation and final evaluation stages of the ADDIE model were not yet conducted. This.....