How does the D&S Headmaster CNA skills test work?
Updated · Reviewed against official sources
In D&S Diversified Technologies (Headmaster) skill tests, as described in the Ohio handbook, you get three or four tasks in 35 minutes, starting with a mandatory task that includes hand washing. Each task passes only if you do every bolded key step and at least 80% of the other steps, and you can go back and correct any task until you say you're finished.
| Rule | What it means for you |
|---|---|
| All key steps + 80% of non-key steps | One missed bold step fails the task, and too many small misses also fail it |
| Not order dependent unless BEFORE/AFTER | You won't fail for doing steps in a different order, except where the step says so |
| Verbalized or simulated steps don't count | You must physically do each step |
| Correct any task, any time in 35 minutes | Tell the observer and redo the step to get credit |
| Retest repeats a failed task | Your weakest task will come back |
| Pulse ±6, respirations ±4, output ±25 mL, fluid intake ±60 mL, food intake ±25 percentage points | Looser vitals, but you also record intake |
Why Headmaster tests feel different
Credentia and Prometric don't let you go back to a finished skill. Headmaster does, within your time. Use it: when you finish your last task, spend any spare minutes thinking through each earlier task's bold steps before you say "I'm finished."
The flip side is the 80% rule: you can't rely on getting only the critical steps right.
Quick answers
- Does Headmaster use actors or manikins?
- In Ohio, live resident actors for most tasks, and a manikin for perineal care and female catheter care tasks.
- How do I sign the recording form?
- In Ohio you sign the recording form during the equipment demonstration, then record counts and measurements on it.
- Which states use D&S Headmaster?
- Ohio is one; check your state's registry page for its current vendor.
What to do next
See Ohio's full 21-task list and attempt rules.
You must pass the written test too. Take the free 20-question practice test, or unlock the timed 60-question exam simulator, the full question bank and every skill checklist for $29 one-time (or $9/month).
Related guides
- Ohio STNA skills test: which skills are on it?
- Do you have to say the steps out loud on the CNA skills test?
- Can you correct a mistake during the CNA skills test?
- Credentia vs Prometric vs Headmaster: how the CNA skills test differs
- Credentia NNAAP skills list: all 23 skills and their tolerances
- How does the Prometric CNA clinical skills test work?
Sources
- Ohio Nurse Aide Candidate Handbook, Version 27, December 2025 (D&S Diversified Technologies / Headmaster, PDF)
- D&S Diversified Technologies — Ohio CNA
Checked: . Rules, fees and vendors change — always confirm with your state's official page and candidate handbook.