Final answer:
The correct step is to inform and obtain consent from the interview participant before recording for educational purposes, in adherence to ethical research practices and privacy rights.
Step-by-step explanation:
If an interview is being recorded for educational purposes, the most important step is to inform and obtain consent from the participant. This is a core principle of ethical research methodology and is aligned with respecting subjects' rights to privacy and dignity. Informed consent ensures that participants are fully aware of the nature and purpose of the research, and agree to take part in it. This process includes providing clear information about how the recordings will be used, whether the data will be archived or destroyed post-research, and any rights the participant has in relation to the content gathered, such as anonymity or the right to review and edit the findings before they are shared. Researchers must always seek informed consent, uphold confidentiality, and protect the participants from harm. Under no circumstances should the recording be done without the knowledge and permission of the interviewee.