Perception changes learning

What information disappears when no one describes the screen?

Watch a short, visual-only math lesson. Change the simulated viewing condition, compare audio-description approaches, and then answer the same learning question.

This activity demonstrates selected access barriers; it does not reproduce anyone’s lived experience or the full range of a disability.

Interactive simulation

Try the lesson from a first-person perspective

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First-person view from a university study desk, facing a computer monitor in a softly lit academic workspace.
MAT 1033 · Practice lesson No visual effect

Audio description quality

Choose what you will hear when spoken descriptions are on.

Description studio

Compare bad, okay, and good descriptions

Choose a quality level here to update the spoken description used in the simulation.

Specific and instructional

“Five is subtracted from both sides, leaving three x equals fifteen. Both sides are divided by three; x equals five.”

Why it matters for learning

The description names what changes, where it changes, and what the learner should understand—without interpreting beyond the video.

OperationLocationResultLearning purpose
Standard description

Preserves the video’s pace

Descriptions fit into available time while the video continues. This works when visuals change slowly enough to describe the essential information clearly.

“Five is subtracted from both sides. The left side becomes three x, and the right side becomes fifteen.”
Extended description

Creates time for instruction

The video pauses at natural points so the description can explain dense equations, spatial relationships, or a sequence that cannot fit between visual changes.

“The video pauses as a minus-five marker appears under each side. Subtracting the same value from both sides keeps the equation balanced, producing three x equals fifteen.”

Key takeaway

Audio description can carry instructional meaning—not just visual detail.

For blind and low-vision learners, it can provide access to information that is otherwise absent. Clear verbalization may also support learners who process visual information differently, divide attention across complex media, or benefit from hearing steps reinforced.

Describe
what changes
Connect
action to result
Pause
when detail needs time

Equivalent access

Full text alternative

Use this transcript if the video, visual effects, or synthesized speech do not provide an effective experience for you.

Read the math video transcript and descriptions

Solving 3x + 5 = 20

  1. Starting equation: The screen displays 3x + 5 = 20 and asks the learner to solve for x.
  2. Undo addition: Subtract 5 from both sides. The equation becomes 3x = 15.
  3. Undo multiplication: Divide both sides by 3. The equation becomes x = 5.
  4. Check the solution: Substitute 5 for x: 3(5) + 5 = 20.
  5. Verify: The left side simplifies to 20, so 20 = 20. The solution x = 5 is correct.