The question asks how to verify understanding in a participant with low literacy after teaching about hypoglycemia. The correct approach is to have the participant explain, in her own words, what she will do at home if she feels shaky.
Why teach-back is the best method here
Teach-back is a structured communication strategy in which the learner restates health information in her own words. This method confirms whether the message was received correctly and immediately exposes gaps or misunderstandings that the nurse can correct on the spot. For adults with limited reading ability, teach-back is especially appropriate because it does not require reading or writing skills. A participant who finished only elementary school and understands the local language better than English can still demonstrate understanding by speaking.
In contrast, asking yes-or-no questions such as “Did you understand?” or “Do you have any questions?” often invites a polite “yes” even when the person did not fully grasp the material. A written quiz would unfairly test reading ability rather than knowledge of hypoglycemia management. The scenario specifically describes a participant who reads poorly, so any evaluation that depends on literacy would not accurately measure learning.
The teach-back method shifts the focus from whether the learner says she understood to whether she can actually state the correct action. Asking the participant to tell what she will do at home if she feels shaky requires her to retrieve and apply the information, which is a stronger indicator of learning than simple agreement.
Key point! Teach-back is recommended for low-literacy learners because it assesses comprehension through spoken words, not written text.
Watch out! Yes-or-no questions and written quizzes do not reliably measure understanding in patients with low literacy.
| Evaluation method | Why it works or fails for low-literacy learners |
|---|
| Teach-back (ask her to tell what she will do) | Confirms understanding through spoken explanation; no reading required; reveals errors for immediate correction |
| Ask “Did you understand?” | Invites polite agreement; does not show actual comprehension |
| Written quiz | Tests reading ability more than knowledge; unfair for poor readers |
| Ask “Do you have questions?” | Many low-literacy learners may not know what to ask or may feel embarrassed |
The evidence supports this approach across chronic disease education. In a randomized controlled trial of patients with type 2 diabetes and low health literacy, teach-back was used as one of two educational strategies to improve diabetes knowledge and adherence . A separate study found that adding a teach-back protocol after a multimedia diabetes education program improved knowledge retention at two-week follow-up, and the benefit was examined across different literacy levels . More recent experimental work also applied teach-back based on health literacy strategies to improve treatment adherence and quality of life in type 2 diabetes . A scoping review further describes teach-back as a structured communication strategy that enhances understanding and self-management in adults with complex chronic conditions .
For a participant who reads poorly, the most valid check of understanding is to ask her to verbalize the specific action she will take when symptoms occur. This approach aligns with the teach-back method and is supported by research in diabetes education for low-literacy populations.