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 — Nutrition-Analysis Defense

Scored against the Nutrition-Analysis Defense rubric · after Unit 07.

Setup. The student analyzes a real diet or single food using its nutrition data — their food, their label or dataset, their read of the numbers. You name the food or diet to work up; they read the nutrition data, reason about what it does and doesn't show, and defend an evidence-based recommendation out loud while you watch their thinking. Because it's their read of the data and their argument, there is nothing to outsource.

The question ladder:

• Read the data: "Work up this food's nutrition data and tell me what it shows." (Can they read servings, macronutrients, and micronutrients accurately?)
• Reason: "Make an evidence-based recommendation from that data — show me the reasoning." (Do they argue from the evidence to a claim, framed as reasoning rather than an order?)
• System: "How does this one food fit an overall balanced pattern, rather than being judged in isolation?" (Do they see food in the context of a whole diet, not as good-food/bad-food?)
• Counterfactual: "If the serving size on the label were doubled, how does your reading change and why?" (This is the rehearsal-proof rung — a memorized answer dies here.)

Demonstration 2 — Timed Label-and-Data Reading

Scored against the Timed Label-and-Data Reading rubric · after Units 02–04.

Setup. Under a time limit, the student reads a set of nutrition labels and health data and separates the science from the marketing — what the numbers actually show versus what the packaging claims. The clock is the integrity mechanism: there is no time to look anything up, and the skill of reading a label honestly and naming a marketing claim for what it is can't be generated.

The question ladder:

• Read & report: "Read these labels and tell me exactly what the data shows." (The core skill — servings, quantities, ingredient order.)
• Science vs. marketing: "Which claim on this package is supported by the data, and which is marketing?" (Can they tell an evidence-backed statement from a health-halo claim?)
• Discriminate: "How do you know this ‘natural’ or ‘low-fat’ label doesn't tell you what it seems to?" (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 counterfactual on your nutrition-analysis recommendation — come back when you can reason through how a change in the serving size would shift your read of the data.")
• 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.