Health, Safety & Good Habits — Handout

Reading material for the module. The module itself is where you practise on a real simulated workstation and get marked — this is what to read before, alongside, or afterwards. 15 levels across 6 phases; Levels 1–3 are free and 12 are part of the module purchase.

What this module covers — and what it does not

Covers: setting up a workstation correctly (monitor, chair, feet, back); eye care and break habits; safe charging, handling and cleaning of a device; dust, heat and airflow; electrical safety around shared power strips and sockets; what to do in a power cut; safe headphone volume; recognising digital fatigue; shared-lab hygiene and etiquette; and reporting damage honestly instead of hiding it.

The physical hardware itself — what a power supply is, ports, internals — belongs to Meet the Computer: Hardware Mastery. This module treats the device as something you must handle and power safely, not something you take apart.
Starting up, signing in and shutting down belong to Turning It On — Startup, Login & Shutdown. This module's “save your work” habit and power-cut content is the safety half of that story, not a re-teach of the boot sequence.
Touch-typing posture and finger position belong to Keyboard & Touch-Typing Mastery. This module's break-habit content (Level 10) points there rather than repeating it.
Password and account security, and online safety belong to a later internet-safety module — this module is about the physical body and the physical room.
First aid and formal electrical-wiring work are outside this module's scope. The taught response to a real electrical fault is always to report it, never to fix wiring yourself.

Your Body & the Screen

Level 1 — Setting Up Your Workspace

Monitor distance and height, chair height, feet and back — fixed on a real desk, not just described.

Poor computer posture doesn't hurt today. It hurts after months — sore wrists, a stiff neck, tired eyes, a bad back. Every one of those is preventable by how the desk is set up before you ever start typing. This level puts you in front of a real workstation with one thing wrong at a time. Fix it, and watch the little figure change shape as you do — that is the whole lesson, made visible instead of just described.
Look at the dashed line across the scene below — that is your eye line. Five things need to be right, every time you sit down: how far the screen is, how high it is, how high the chair is, where your feet are, and how your back is supported.
One more pass, this time with the mistakes in different combinations — in a real room you rarely get only one thing wrong at once.
Five checks, every time you sit down: distance, height, chair, feet, back. It takes ten seconds and it is the single most preventable source of computer-related pain there is.

Level 2 — Sitting, Moving & Taking Breaks

Why movement matters, wrist support, and how often to stand up during a long session.

A perfectly set-up chair still causes problems if you never move. The body is built to move — sitting in one exact position for hours, even a correct one, is its own kind of strain. This level is about the habits around the desk, not the desk itself: when to move, when to break, and what to do with the small things — wrists, legs — that Level 1 didn't cover.
You've been sitting still, typing, for over an hour. What should you do? A short stand-and-stretch breaks the strain of a fixed position, and it costs you almost no time against the whole task.
Which is the better habit during a long study or work session? Small, regular changes in position keep blood moving and stop any one muscle group from being loaded for hours straight.
Crossing your legs under the desk for a short while is completely normal. Doing it for hours, every single day, is more of a concern because it: It's not an emergency after ten minutes — it's the daily, hours-long repetition that turns a harmless habit into a real one worth breaking.
Your wrists rest on a hard, sharp desk edge while you type for long stretches. What's the best fix? A hard edge pressing into the wrist for hours is real, avoidable strain — a soft pad under the wrists removes it completely.

Level 3 — Eye Care & Screen Comfort

The 20-20-20 rule, brightness and contrast, glare, and reading text comfortably.

Your eyes were not built to stare at one fixed distance for hours — the muscles that focus them get tired exactly the way any other muscle does, and screens make this worse because people blink far less while staring at one.
The 20-20-20 rule says: every 20 minutes, look at something roughly ____ away for ____ seconds. Looking at something far away lets the eye's focusing muscles fully relax, which close-up staring never allows.
The room is dark, but the screen is very bright. What does that big contrast do? Matching the screen's brightness to the room around it, roughly, is what actually reduces the strain — not maximum brightness.
Text on the screen is too small and you're leaning in close to read it. Best fix? Every real application has a zoom or font-size control precisely so you never have to solve small text with your posture.

Caring for the Device

Level 4 — Safe Charging & Handling(paid level)

Chargers, cables, closing the lid, and how a device actually gets carried.

A device is handled hundreds of times a day — plugged in, unplugged, carried, opened, closed. Most damage doesn't come from one dramatic accident. It comes from the same small bad habit, repeated for months.
Four more, mixed — how it's carried and where it charges.

Level 5 — Cleanliness, Dust & Liquids(paid level)

Cleaning a screen and keyboard safely, and keeping dust and drinks away from the machine.

Dust is a genuinely bigger problem in Uganda's dry season than in a lot of the world — it works into every gap a machine has. Liquids and dirty hands do their own separate damage. This level is about cleaning safely, not just cleaning.
Three more — drinks, dust cover habits, and what happens if dust is simply ignored.

Level 6 — Heat, Vents & Where You Use It(paid level)

Airflow, covered vents, direct sun, and what an overheating machine is telling you.

Every laptop breathes — it pulls in cool air and pushes hot air back out through vents. Where you use it decides whether that breathing actually happens.
A laptop feels very hot and its fan is running loudly after an hour on a soft cushion. What should you do? A loud fan and real heat are the machine telling you its vents are blocked — clearing them, not muffling the noise, is the actual fix.

Electrical Safety in the Lab

Level 7 — Power Strips, Sockets & Surge Protection(paid level)

Shared extension cords, overloaded sockets, frayed wires — and reporting what you find.

Shared extension cords and power strips are a fact of life in most Ugandan computer labs — one wall socket, ten machines. Used carefully, that's completely fine. Used carelessly, it's a real fire and shock risk.
You notice a cord with cracked, peeling insulation still powering three computers. What should you do? A damaged cord is repaired or replaced by someone qualified, not covered over and left in service — reporting it is the whole fix.

Level 8 — Power Cuts, UPS & Generators(paid level)

What to do the instant power cuts, and how a UPS and surge protection actually help.

Mains power isn't always steady — in a lot of places, a power cut is a matter of when, not if. The machine surviving that is mostly about habits, not luck.
The power just cut without warning. Your laptop is still running on battery. What's the single most useful habit to build for this exact moment? This is the one habit that makes every other power problem in this module survivable — unsaved work is the only thing a power cut can actually take from you.
What does a UPS (uninterruptible power supply) actually do? It doesn't stop a power cut — it buys you the few minutes a save and a safe shutdown actually need.
Power comes back on suddenly after a cut. A desktop machine was left switched on the whole time. Why does that matter? The moment power comes back is often the riskiest moment of the whole cut — a surge protector absorbs that spike before it reaches the machine.

Hearing & Digital Wellbeing

Level 9 — Safe Headphone Volume & Hearing(paid level)

The 60/60 rule, real hearing-damage signs, and setting a genuinely safe volume.

Hearing damage from headphones is real, and unlike most of this module, it can be permanent — the tiny hair cells in the inner ear that let you hear don't grow back once loud sound has damaged them. A well-known rule of thumb: roughly 60% volume, for no more than 60 minutes at a stretch. It isn't an exact science, but it's a genuinely useful guide.
Which guideline is a genuinely useful rule of thumb for headphone use? The “60/60” rule balances loud enough to actually enjoy against quiet enough to listen for real stretches of time without damage.

Level 10 — Digital Wellbeing: Screen Time & Fatigue(paid level)

Recognising fatigue and building real break habits into long typing and study sessions.

Everything in this module so far protects your body. This level is about your focus — the very real fatigue that builds up over a long stretch on a screen, and the break habits that keep it from wrecking a study or exam session. This connects directly to Keyboard & Touch-Typing Mastery's longer practice and exam sessions — the habit taught here is exactly what makes those sustainable.
You've been sitting and typing for 45 minutes straight, no break at all. What should you do right now? Focus actually gets worse the longer you push past a natural break point — a two-minute break makes the next 45 minutes more productive, not less.
Which of these is a real, common sign of digital fatigue? These are the honest, physical signs that a break is overdue — worth recognising in yourself before they get worse.

Shared Lab Etiquette

Level 11 — Lab Hygiene & Respecting Shared Equipment(paid level)

Hand cleanliness, eating near equipment, tangled cables, and leaving a machine ready for the next student.

In a shared lab, equipment is a limited resource everyone depends on — the habits here aren't really about rules, they're about not making the next student's session worse than yours was.
Three more — cables underfoot, and how you leave the machine when you're done.

Level 12 — When Something Goes Wrong: Report, Don't Hide(paid level)

The right response to a spill or a breakage — and why reporting always beats hiding it.

Accidents happen — a spill, a loose key, a cracked corner. None of that makes you a bad student. What matters is what you do next, and hiding it is always the choice that makes things worse.
You accidentally spill a small amount of water near the keyboard. What's the FIRST thing to do? Cutting the power stops the liquid from reaching anything live while it's still spreading — that single action is what actually protects the machine.
You've switched the machine off and reported the spill. What's the right next step? You've already done the important part — power off and report. Opening electronics you're not trained on turns one small accident into a bigger one.
You notice a keyboard key is loose after your session — you're not even sure you caused it. Best action? Reporting it protects the next student from being wrongly blamed, and gets the actual fault fixed — whether or not you caused it.

Bringing It All Together

Level 13 — Judgement Drills: Spot the Hazard(paid level)

A mixed review across every category — device care, electrical, heat and etiquette together.

One review level, mixing every category so far — device care, cleanliness, heat, electrical safety and lab etiquette, all in the same set of drills. Real life doesn't sort hazards into neat categories for you.

Level 14 — Judgement Drills: What Would You Do?(paid level)

Real situations that combine more than one lesson at once, weighed the way a real decision works.

Real situations usually combine more than one thing this module has covered. This level asks you to weigh a few factors at once, the way a real decision actually works.
You're setting up for a two-hour study session on a laptop with 40% battery and no charger nearby, at a desk with harsh glare from a window behind the screen. What's the smartest first move? Glare causes real, immediate eye strain for the entire session and costs seconds to fix — the battery only becomes a decision if it actually starts running low.
It's a hot, dusty afternoon in the lab and it's break time. Which combination of actions best protects the equipment while everyone is away? This combines three separate lessons from this module — protect unsaved work, protect against dust, and don't trap heat — in the one moment they actually apply together.
A classmate is using headphones at a volume you can hear from across the room, on a machine balanced on a pillow on their lap, an hour into a session with no break taken. Which single thing is the most urgent to mention? All three are real, but they're not equally serious: overheating and fatigue are both reversible once you fix them, permanent hearing damage is not.

Level 15 — Capstone: A Whole Session in the Lab(paid level)

One realistic session start to finish. Eighteen scored tasks, pass mark 14.

The final practical. One realistic lab session, start to finish: arriving at a workstation with real problems in it, working safely through it, handling two real incidents, and leaving it properly for the next student. Every task from here is a single attempt and is scored. Eighteen tasks. Pass mark 14.
Workstation set up correctly, hazards spotted and sorted, breaks taken, a power cut and a spill both handled the right way, and the desk left properly for the next student. That is the whole subject: protect your body, protect the equipment, and protect the person who uses this desk after you. None of it is complicated — it's just worth doing every single time, not only when something has already gone wrong.

Reference 1 — The five-point workstation check

Check	Right answer	Why it matters
Monitor distance	About an arm's length away	Close-up focus for hours strains the eyes.
Monitor height	Top of the screen at eye level	Looking down (or up) for hours is a common cause of neck pain.
Chair height	Feet flat, knees level with hips	Either direction wrong tilts the pelvis and cuts circulation.
Feet	Flat on the floor or a footrest	Anchors your whole sitting position.
Back	Upright, supported by the chair	The chair's support does nothing if you're slouched forward off it.

Ten seconds, every time you sit down. This single check prevents more computer-related pain than anything else in this module.

Reference 2 — Eye care

The 20-20-20 rule: every 20 minutes, look at something roughly 20 feet (about 6 metres) away for 20 seconds. It lets the eye's focusing muscles fully relax.
Match screen brightness to the room — a screen far brighter (or dimmer) than its surroundings forces the eyes to keep readjusting.
Fix glare at the source — angle the screen away from a bright window rather than squinting through the reflection.
Text too small? Increase the zoom or font size. Leaning in permanently is a posture problem in disguise.
Dry, tired eyes are usually caused by blinking far less than normal while concentrating on a screen — breaks and deliberate blinking both help.

Reference 3 — Device care: do this, not that

Do this	Not this
Unplug by holding the plug	Yanking the cable
Use the charger made for this device	Any charger that happens to fit
Close the lid gently, by the frame	Slamming it shut
Carry a closed laptop by its base	Picking it up by the screen
Charge on a hard, flat surface	Leaving it charging under a blanket
A soft, dry microfiber cloth on the screen	A dripping wet cloth
Compressed air for keyboard and vents	Spraying liquid cleaner onto the keys
Wipe or wash hands before typing	A drink right next to the keyboard

Heat and airflow: use a hard, flat surface or a rigid lap tray, not a bed, cushion or thick blanket — soft fabric blocks the vents. Keep the machine out of direct, hot sunlight. A very hot machine with a loud fan is telling you its airflow is blocked; move it, don't muffle it.

Reference 4 — Electrical safety in the lab

Do this	Not this
One device per socket on a proper strip	Daisy-chaining one extension cord into another
A strip with surge protection	A cord with cracked, peeling insulation, still in use
Keep power strips away from water	A kettle, a heater and three computers on one small strip

Shared extension cords are a fact of life in most Ugandan computer labs — used carefully, that's fine. A frayed cord or an overloaded strip is never “someone else's problem”: report it immediately, even mid-session.

Reference 5 — When the power cuts

Save your work immediately, on any battery-powered device still running. Unsaved work is the only thing a power cut can actually take from you.
Wait calmly for power to return — don't restart or unplug things unnecessarily. There's nothing left to protect by unplugging mid-cut; the mains supply is already gone.
When power returns, let a surge protector do its job. The moment supply comes back is often the riskiest moment of the whole cut.

A UPS (uninterruptible power supply) holds a small battery so a cut gives you a few minutes to save and shut down safely — it doesn't prevent the cut, it bridges the gap. A generator or UPS has a real rated load limit, exactly like a power strip; don't overload it with heavy appliances.

Reference 6 — Safe headphone volume

The 60/60 rule: roughly 60% volume, for no more than 60 minutes at a stretch. Hearing damage from sustained loud volume — especially through headphones or earbuds sitting right in the ear canal — can be permanent: the tiny hair cells in the inner ear that let you hear do not grow back. If someone else can hear your headphones from across the room, the volume is genuinely too high.

Reference 7 — Digital fatigue: know the signs

Headache
Dry, tired eyes
Difficulty concentrating
Increased mistakes

A short break every 30–60 minutes makes the NEXT stretch of work more productive, not less — it resets focus before fatigue starts causing mistakes. This applies directly to long typing practice or exam sessions (see Keyboard & Touch-Typing Mastery): shorter, focused sessions with real breaks beat one long unbroken cram every time.

Reference 8 — Shared-lab etiquette

Wipe or wash your hands before using shared equipment.
Never eat over a keyboard — crumbs and grease are some of the hardest things to clean out.
Wipe shared headphone pads before use.
Keep cables tidy and off the walking path — a trailing cable is a trip hazard for the next person.
Sign out or log off when you're finished — it protects your account and readies the machine for the next student.

Reference 9 — Report, don't hide

A liquid spill near the keyboard: Switch the machine off (unplug a desktop) immediately, then tell your instructor. Leave it for a technician — don't open it yourself.
A loose or broken key, cracked casing, anything you're not sure you caused: Mention it to whoever's in charge anyway. It gets fixed sooner, and protects the next student from being unfairly blamed.
A frayed cord or an overloaded power strip: Report it immediately — even mid-session. It's never “someone else's problem” while it stays in service.

Reporting damage — even damage you're not sure you caused — gets equipment fixed sooner and protects whoever uses it next from being unfairly blamed. It is never about admitting fault; it is about the equipment and the next person.

Completing a level’s practical exam earns a Skill Badge — this is skill-building and self-assessment, not a certification or formal qualification.