The purpose of this paper is to contribute to the literature related to assessment cocreation, specifically on students' perspectives on their participation throughout the process, including the professor's role as well as the knowledge and skills students acquired in assessment co-creation in online and blended settings. To do so, we conducted qualitative research where three cases were examined through a validated survey. Quantitative data (Likert scale and close-ended questions) was analyzed with excel whereas to study qualitative data we used Atlas.ti. As a result, students appreciated the opportunity given as they believe it helped them to better understand the assessment process, as well as allowing them to improve their own understanding of their assignments and, therefore, to better perform on them. Also, students claim they have acquired different skills: from academic to life-long learning skills. In conclusion, we believe assessment co-creation has great potential to help students' self-regulation and agency as well as to enhance students' motivation, proactivity, and collaborative participation in their own learning process. Finally, we would like to point out that more studies related to this topic need to be conducted since there are only a few examples.