Not really sure about the education in context part, but I think you'll need to discuss the pros and cons of unstructured interviews?
Pros: -Gain detailed, qualitative data
-As questions aren't pre planned, you can expand and ask further questions on something the participant said that may be of interest
-A certain point/topic may come up that the researcher hadn't previously though of
- Participants can give detailed answers/reasons for their answers and explain themselves
Cons: -Time consuming
-Need a skilled interviewer
-Interviewer presence may influence answers
Depending on the "eduation" topic being researched, it ma cause participant emotional distress e.g bullying in school or lack of educational success?
:s hope this has helped a bit, not really sure on the education bit, sorry!