Without knowing your purpose, problem statement, research questions, and methodology, one cannot answer this question. What kind of study are you conducting? Qualitative? Quantitative? Case study? Mixed methods? Define the population and state how you intend to collect data.

The best sampling method for studying the implementation of blended learning in a university is purposive sampling, as it allows researchers to select participants (such as students, instructors, or administrators) who are directly involved in blended learning. This approach ensures relevant and in-depth insights, especially in qualitative or mixed-methods research. If the study aims for broader generalization, stratified random sampling may be used to ensure representation across departments or student groups.

Tshireletso Philemon Kgosiemang Vira Gorelova Purposive sampling in a mixed-methods research study is ideal in order to encapsulate whatever you are trying to measure in your research topic.

Shahsuvarona and Norman, and dear colleagues thank you so much for your assistance. God Bless

It definitely depends upon the nature of study. But the ground reality differs in terms of use of technology. So I think consider "purposive sampling" can be appropriate as per your reach to the universities where blended learning apporach is being followed with upgradations.