How to Write a Discussion Post (and Reply to Classmates)

Key takeaways

• Answer every part of the prompt directly, support it with 1–2 scholarly sources, and cite them in the required style (usually APA).
• Most initial posts are 250–350 words; replies are usually 100–150 words.
• Good replies add something new, such as a question, an example or a source, rather than just "Great post!"

Discussion posts are a big part of the grade in online courses on Canvas, Blackboard, Moodle and D2L, especially in nursing, education, business and psychology. They're short, but instructors grade them against a rubric, and small habits make a big difference.

Before you write: read the prompt and rubric

Break the prompt into its separate questions. A prompt that says "Describe… explain… and give an example" has three parts, and rubrics usually award points for each one. Also check:

• Required length (word count or number of paragraphs)
• Number and type of sources (e.g., "one peer-reviewed article from the last 5 years")
• Deadlines for the initial post and for replies (often different days)

How to structure an initial post

1. Opening (1–2 sentences): answer the main question directly.
2. Body (1–2 short paragraphs): explain your answer, apply course concepts, and support it with evidence and in-text citations.
3. Example or application: a real-world case, a workplace or clinical experience, or a current event.
4. Closing (1 sentence): a takeaway or a question that invites responses.
5. References: full citations in the required style.

Example initial post

Prompt: Explain why hand hygiene compliance is low in hospitals and suggest one strategy to improve it.

Despite being the most effective way to prevent healthcare-associated infections, hand hygiene compliance among healthcare workers is often below 50% (World Health Organization [WHO], 2009). Common barriers include heavy workloads, skin irritation from frequent washing, and the belief that gloves remove the need for hand hygiene.

One evidence-based strategy is placing alcohol-based hand rub at the point of care, combined with regular feedback on compliance rates. In my clinical placement, installing dispensers beside every bed noticeably reduced missed opportunities during busy shifts.

Which barriers have you seen in your own workplace or placement?

Reference World Health Organization. (2009). WHO guidelines on hand hygiene in health care. WHO.

How to reply to classmates

Strong replies continue the conversation. Try one of these approaches:

• Extend: add a new source or perspective. "Your point about workload reminded me of a study that found…"
• Apply: connect their idea to a different setting or example.
• Question: ask a thoughtful follow-up. "Do you think feedback works better from peers or managers?"
• Respectfully challenge: offer a counterpoint with evidence.

Avoid replies that only say "I agree, great post!", which usually earn few or no points.

Discussion post template

• Answer: [Direct answer to the question.]
• Explanation: [Course concept + evidence (Author, Year).]
• Example: [Real-world or personal application.]
• Question: [Invite discussion.]
• References: [Full citations.]

Tips for full marks

• Post early. Late initial posts get fewer replies and often lose points.
• Use headings or short paragraphs so posts are easy to read on screen.
• Proofread. Posts are graded as academic writing.
• Keep a professional, respectful tone, even when you disagree.

Frequently asked questions

How long should a discussion post be?

Follow your rubric. If none is given, 250–350 words for the initial post and 100–150 words per reply is typical for college courses.

Do discussion posts need citations?

Usually yes. Most rubrics require at least one scholarly source in the initial post, with in-text citations and a reference list in APA or the style your course uses. See our APA 7th edition guide.

Can I use "I" in a discussion post?

Yes. Discussion posts are less formal than essays, and sharing personal or professional experience is often encouraged. Keep the tone academic.

How many replies should I write?

Most courses require two replies to classmates, sometimes on different days. Check the instructions.