The demonstration-moment script.

The demonstration is the part of the course that cannot be faked, outsourced, or generated. A student stands in front of you and shows understanding in real time, against a rubric, out loud. Your job is to run it the same way every time: a setup that makes faking impossible, a question ladder that probes past rehearsal, and a clean binary verdict recorded against the rubric.

The three rules that govern every demonstration

1. The student does the work; you only ask. No coaching, no leading questions, no "are you sure?" that signals the answer. You probe understanding — you never supply it.
2. The verdict is binary. Mastered or not yet. You are not assigning a score in the room; you are deciding whether the published rubric's bar was cleared.
3. A "not yet" is a checkpoint, not a failure. How you deliver it determines whether the student comes back. Name the specific gap, give the re-attempt path, and keep the door open.

Demonstration 1 — Evidence-analysis defense

Scored against the evidence-analysis defense rubric · after Unit 06.

Setup. The student works a single piece of physical evidence to a conclusion on their own apparatus — their comparison, their method, their call. You hand them the item and a reference; they run the analysis, reach an identification, and defend the ID, the method, and how certain they can honestly be, out loud, while you watch their hands and listen to their reasoning. Because it's their analysis and their judgment, there is nothing to outsource.

The question ladder:

• Procedure: "Analyze this piece of evidence and give me your conclusion." (Can they reach a clean, defensible identification?)
• Reasoning: "Walk me through how you got there — show me the evidence." (Do they reason forward from the observed features, not a memorized answer?)
• Certainty: "How sure can you honestly be, and what would it take to be more sure?" (Do they treat a match as a likelihood rather than proof — and know the analyst reports, the court decides?)
• Counterfactual: "If one feature had come out differently, how does your conclusion change and why?" (This is the rehearsal-proof rung — a memorized answer dies here.)

Demonstration 2 — Timed scene processing

Scored against the timed scene processing rubric · after Unit 08.

Setup. Under a time limit, the student processes a mock scene — documenting, photographing and sketching it, then prioritizing and collecting the evidence in the right order without contaminating it — and records what they find. The clock is the integrity mechanism: there is no time to look anything up, and the motor skill of working a scene cleanly and recording it honestly can't be generated.

The question ladder:

• Process & document: "Work the scene and tell me exactly what you're recording and in what order." (The hands-on skill itself — documentation, sequence, contamination control.)
• Prioritize: "What do you collect first, and what told you?" (Can they justify the order from the scene in front of them, not from a memorized checklist?)
• Discriminate: "How do you know that mark is evidence and not an artifact of the scene?" (The recurring confusion — this is where a shaky student reveals themselves.)

Demonstration 3 — Oral lab-notebook defense

Scored against the lab-notebook-defense rubric · end of each unit.

Setup. The student walks you through their own notebook: the question, the method, the data, the anomalies, the interpretation. Because it is their recorded work, the defense is unfakeable — a student who didn't do the thinking can't narrate the decisions behind it.

The question ladder:

• Narrate: "Walk me through what you did and why." (Does the story hold together?)
• Anomaly: "This data point doesn't fit — what happened?" (Did they notice, and can they reason about it honestly rather than hide it?)
• Method critique: "What would you change if you ran it again?" (Do they understand the method's limits and sources of error?)
• Transfer: "How does this connect to the concept from this unit?" (Integration — scored on its own line.)

Reading the room: mastered vs. approaching

Recording the verdict

Mark the rubric in the room while it's fresh — pass or not-yet on each rubric line, with a one-line note on the deciding moment. If the verdict is "not yet," that note becomes the re-attempt instruction. Do not soften the rubric to avoid an awkward conversation; soften the delivery instead.

Delivering a "not yet" so the re-attempt stays likely

• Lead with what was solid before naming the gap — the student needs to know the work wasn't wasted.
• Name one specific thing to close, not a list. ("The certainty rung on your evidence analysis — come back when you can say how sure you can honestly be and what would change the conclusion.")
• Give the date and the path. A "not yet" with a re-attempt slot on the calendar is a checkpoint; a "not yet" with no path is a wall.