Add a 90-Second Oral Defense to Written Work

A written assignment can show the quality of the final argument, analysis, or design. It may not show why the student made one important choice.

You do not need to replace the assignment or schedule an oral exam with every student to make that reasoning more visible. Add one short asynchronous question:

Choose one important decision in your submitted work. Explain what you chose, what alternative you considered, and what evidence led you to your decision.

Give students 60–90 seconds to respond. Allow notes and reasonable retries. Grade the reasoning, not the production.

That is the complete activity. The rest of this guide will help you attach it to the right decision, set expectations, keep review manageable, and avoid treating the recording as proof of authorship.

For the broader evidence, format choices, and age-of-AI assessment context, read Asynchronous Oral Assessments in the Age of AI.

Table of Contents

Ask for one decision, not a summary

“Summarize your paper on video” sounds straightforward, but it often asks students to repeat information the instructor already has. It creates another artifact without necessarily adding another kind of evidence.

A decision-focused prompt is more useful. It directs attention to the part of the work that may be invisible in the final submission:

• Why did the student choose this method?
• Which source changed their interpretation?
• What design alternative did they reject?
• Which revision mattered most?
• What limitation would make them change course?

Cornell's Center for Teaching Innovation recommends pairing oral and written work when the two modes assess student understanding in different ways. It also emphasizes alignment: the oral component should assess an outcome that oral explanation can actually reveal.

Keep the written work. Add the defense only where explanation contributes something the artifact does not.

Copy this 90-second oral-defense activity

Purpose

Add a small piece of direct explanation to an existing written assignment without scheduling a separate live oral exam.

Student prompt

Choose one important decision in your submitted work. Explain what you chose, what alternative you considered, and what evidence led you to your decision.

Student instructions

• Record a response of 60–90 seconds.
• Refer to your submitted work; do not summarize the entire assignment.
• You may use notes and have reasonable retries.
• Production quality is not graded.
• Use the assigned camera, audio, or screen-sharing option.
• Follow the provided caption, transcript, or equivalent-access instructions.

What the instructor will assess

1. The response identifies a specific decision.
2. It explains the reasoning behind that decision.
3. It connects the choice to relevant evidence.
4. It acknowledges an alternative, tradeoff, or limitation.

Before assigning it, replace general phrases such as “relevant evidence” with the language of your course. Evidence may mean a scholarly source, data, requirements, a calculation, a case fact, user feedback, or a disciplinary principle.

Set it up in five steps

1. Choose the decision worth explaining

Attach the defense to work students have already completed. Do not create a separate topic merely because video is available.

Choose a decision that requires interpretation. Good options include:

• a method selected over another plausible method
• a conclusion reached from conflicting evidence
• a design tradeoff
• a response to a counterexample
• a revision made after feedback

Avoid questions students can answer by reading their introduction aloud. The prompt should make them point to a choice and account for it.

2. Decide who should see the response

Visibility should follow the learning objective.

Use a private Space or a moderated Topic when responses should stay within the course or need approval before classmates see them. Make responses visible to peers only when comparison, critique, or discussion is part of the activity. Do not make public performance the default.

If every response must remain visible only to the instructor, keep the Topic for that assignment moderated and do not publish its submitted posts or videos.

3. Create the Vivipod Topic

Create or reuse a course Space, then create one Topic containing:

• the decision-focused prompt
• the 60–90 second limit
• the notes and retries policy
• the four assessment criteria
• the visibility and commenting expectations
• the due date and LMS submission instructions, if applicable

If Canvas is the course home, link to or embed the relevant Space rather than duplicating the entire course structure. See how Vivipod Spaces can work with Canvas or a course site.

4. Give students a low-stakes recording path

Explain why the oral component exists: you want to understand one decision, not inspect performance style or catch students in a mistake.

Before the first graded use, provide a simple practice prompt. Share the rubric in advance and tell students whether they may consult notes, slides, sources, or the submitted artifact.

Cornell notes that oral assessment can be uniquely stressful for some students, including introverted and neurodiverse students, and recommends practice, clear criteria, and preparation options. Unless presentation is an outcome, do not grade eye contact, accent, camera confidence, background, or editing polish.

Allow audio, screen sharing, or another mode when a visible face is unnecessary. Plan for captions or transcripts, device and bandwidth access, privacy, and an equivalent route through the institution's accommodation process.

5. Review the reasoning and use a second turn selectively

Score the same four criteria for every student. A simple scale is enough: clear, partial, or not yet evident.

Do not require a follow-up merely to prove that discussion occurred. Ask one only when it would clarify or extend the evidence. A useful default is:

What would have changed your decision?

The student can answer in a comment or a short follow-up recording. If discussion is enabled in Vivipod, comments, @mentions, and timestamped feedback can point to the exact claim that needs attention. See how comments and notifications create a second turn.

Use a lightweight rubric

Score each criterion as clear, partial, or not yet evident:

This rubric is intentionally small. Add discipline-specific criteria only when they serve the learning outcome. Do not add a presentation-quality category out of habit.

Keep the workload bounded

A 90-second limit does not automatically make an activity scalable. It does, however, give the instructor a clear upper boundary.

To keep the activity manageable:

• use one shared rubric
• avoid individual written feedback when the score already communicates enough
• follow up only when clarification would add evidence
• use peer response only when evaluating another person's reasoning is part of the goal
• pilot the activity once before making it recurring

Guffey and colleagues studied asynchronous student-generated videos across four semesters and 1,100 students in an introductory physiology course. The study provides a useful example of asynchronous video operating at large enrollment, but it does not validate this exact 90-second prompt or establish a universal time-saving claim.

Track how long setup, review, moderation, and follow-up take in your own course. Then decide whether the activity belongs once per term, after major assignments, or more often.

What this defense can—and cannot—tell you

The defense can add evidence that a student can identify a decision, explain the reasoning, connect it to evidence, and recognize an alternative or limitation.

It cannot prove that the student never used AI, establish sole authorship of the written submission, or verify identity simply because a face appears on camera.

A systematic review of oral assessment in higher education found that validity, reliability, and academic-integrity value depend on good design, scaffolding, and implementation. The prompt, preparation, criteria, and assessment context matter more than the mere presence of a recording.

Frame the activity accordingly:

The written submission shows the finished work. The oral defense gives you 90 seconds to make one important decision visible.

That is a clear expectation students can prepare for without turning the activity into surveillance.

Try it on one assignment

Choose one written assignment already on your course calendar. Identify the decision you most want students to explain. Paste the prompt into a Vivipod Topic, add the four criteria, and pilot it as a low-stakes activity.

Keep the LMS as the system of record. Use Vivipod for the short explanation and the occasional second turn that helps you hear the reasoning behind the work.

Create a free Vivipod Space for the activity.