No.3
Microlearning Spaced retrieval

Cold Chain

The annual food-safety course is forgotten by February. This series breaks it into three-minute lessons that show up twice a week. You learn a number on Monday, get quizzed on it Wednesday, and see it again the week after. Small, repetitive, and much harder to forget.

Audience · Kitchen & receiving staff
Format · Rise 360-style lessons
Cadence · 3 min, 2× weekly
9:41 MOBILE · MID-SHIFT ▂▄▆ ▮▮▮
Cold Chain · Food Safety Essentials
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Knowledge check
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● Live AI coach
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The schedule above is the spacing algorithm at work: missed items shrink their interval, known items grow it.

This demo mirrors how I structure the course in Rise 360, block by block. The production version also ships each lesson to phones on the spaced schedule below.

How the series works

One idea per card. One question per idea. Twice a week, forever.

01

Monday teaches. A single concept with one number worth keeping. The danger zone, the cooling clock, the receiving threshold.

02

Wednesday asks. Same content, zero re-teaching. Answering from memory strengthens the trace; re-reading only strengthens confidence.

03

The interval grows. Items answered correctly return in two weeks, then a month. Missed items come back in two days. The algorithm is the curriculum.

COMPANION PIECETwo Clocks — the animated lesson intro from the storyboard WATCH → COMPANION PIECEThe Probe — 3D equipment familiarization, drag to inspect EXPLORE → COMPANION PIECEThe Wall Card — the same numbers as a print job aid for the walk-in door PRINT →
XAPI STATEMENT LOG — what an LRS would receive from this session
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// interact with the demo above — statements stream here as they would to a Learning Record Store
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Designer's note

Why I made these choices

Numbers over narratives

I anchored every card to one number because that is what the job asks for at the walk-in door. Nobody needs pathogen theory at 6 AM. They need to know whether 43°F is a problem. It is.

Testing is the teaching

I spend most of each lesson's three minutes on the quiz because retrieval is the mechanism, not the measurement. Answering from memory beats re-reading in nearly every published comparison, so that is where the time goes.

Three minutes, defended

I treated three minutes as a hard constraint. A lesson that fits between two tasks gets done during the shift. A course that needs a back office and a login gets done never.

The theory underneath
Spacing effect · Ebbinghaus, Cepeda

Memory decays on a curve and the schedule is designed against it. Content returns at growing intervals when it is known and shrinking ones when it is missed, so the calendar does the remembering. That schedule is personalization, done honestly: per learner, per item, decided by their actual answers instead of a template.

Retrieval practice · Roediger

Each lesson spends most of its three minutes on answering from memory rather than re-reading. The quiz is the mechanism of learning here, not the measurement of it.

Chunking · Miller, Sweller

One number per card respects the limits of working memory under a kitchen’s conditions. A stressed brain at the walk-in door retrieves single anchored facts, not paragraphs.