Friday, 6 March 2026

Learning vs Revision – Why They Are Not the Same Thing

 


Learning vs Revision – Why They Are Not the Same Thing

Every exam season I see the same pattern. Students say they are revising hard — hours with books open, highlighters at the ready, notes everywhere. Yet when the exam paper appears, the knowledge somehow vanishes.

The reason is simple.

Revision and learning are not the same thing.

Revision assumes the knowledge is already there. Learning is the process of putting it there in the first place.

Think of it like sailing. You can revise how to steer a boat, but if you’ve never learned how the wind affects the sails, revision alone won’t stop you sailing straight into the riverbank.

Let’s look at how real learning works.


Step 1: Understand Before Memorising

The biggest mistake students make is trying to memorise something they don’t understand.

Understanding creates a framework in the brain. Facts then have somewhere to attach themselves.

For example:

  • In physics, if you understand that electricity flows because of potential difference, circuits suddenly make sense.

  • In maths, understanding why differentiation works makes remembering the rules much easier.

  • In chemistry, knowing why atoms bond helps you remember reaction patterns.

Learning should start with concepts first, details later.


Step 2: Active Learning Beats Passive Reading

Reading notes repeatedly feels productive — but it is often an illusion.

Effective learning requires active engagement.

Better methods include:

  • Answering exam questions

  • Explaining the concept out loud

  • Teaching the topic to someone else

  • Drawing diagrams or flowcharts

  • Solving problems without looking at notes

When the brain struggles slightly, it strengthens the memory. Passive reading rarely does.


Step 3: Use Retrieval Practice

One of the most powerful learning tools is retrieval practice — forcing the brain to recall information.

Instead of reading notes again, try:

  • Writing down everything you remember about a topic

  • Using flashcards

  • Doing practice questions from memory

  • Testing yourself regularly

Each time you retrieve information from memory, the neural pathways become stronger.

This is why systems such as the Leitner flashcard method are so effective.


Step 4: Space Your Learning

Cramming might get you through tomorrow’s test, but the knowledge rarely lasts.

Spacing learning over time is far more effective.

A good pattern might look like:

Day 1 – Learn the topic
Day 2 – Review briefly
Day 5 – Test yourself
Day 14 – Test again
Day 30 – Quick review

Each gap forces the brain to rebuild the memory, making it stronger.


Step 5: Use Multiple Ways to Learn

The brain remembers things better when information arrives in different forms.

For example:

  • Diagrams and visual explanations

  • Practical experiments

  • Videos and demonstrations

  • Written summaries

  • Solving problems

This is one reason I often run experiments in the lab with students. Seeing a wave on an oscilloscope or measuring electrical resistance makes the idea far easier to remember than reading about it in a textbook.


Step 6: Focus on Exam Technique

Once learning has happened, revision becomes useful.

Revision should focus on:

  • Practising exam questions

  • Understanding mark schemes

  • Timing answers

  • Recognising common question patterns

Exams reward how well you apply knowledge, not just how much you remember.


A Final Thought

Learning is like building a boat.

Revision is like polishing the paintwork.

You can polish the paint all you like — but if the hull isn’t built properly, the boat still won’t float.

Build the understanding first. Then revision becomes far more effective.

Thursday, 5 March 2026

How to revise effectively (without turning into a human highlighter)

 

How to revise effectively (without turning into a human highlighter)

There’s a particular kind of optimism that appears every term.

It usually arrives at about 8:30pm, armed with brand-new highlighters, a packet of sticky notes, and a tragic belief that “rewriting the textbook” counts as revision.

I love the enthusiasm. I really do.
But if revision were a sport, highlighting would be the warm-up jog… and most students are doing it for three hours, then wondering why they still can’t answer a 6-marker.

So here’s a practical, no-nonsense guide to revising effectively — the stuff that actually moves marks — with a bit of humour, because otherwise we’d all cry into our flashcards.


1) Revision isn’t “taking in information” — it’s practising getting it out

If you only do one thing, do this:

Test yourself. Early. Often. Slightly annoyingly.

Because exams don’t ask:

“Have you seen this page before?”

They ask:

“Can you retrieve it under pressure with a pen that suddenly stops working?”

Best tools:

  • Blurting (write everything you know, then check)

  • Practice questions

  • Flashcards (done properly — see below)

  • Past papers + mark schemes

If it feels a bit uncomfortable, good. That’s your brain lifting weights.


2) Start with the topics that make you go “yeah… I’ll do that later”

Everyone has a “later” topic.
It’s usually algebra, electricity, enzymes, or that one poem where nobody knows what’s going on (including the poet).

Do a quick traffic-light audit:

  • Green: I can answer questions without notes.

  • Amber: I sort of know it, but I wobble.

  • Red: If you asked me now I’d leave the country.

Then revise in this order:
Red → Amber → Green (quick check only).

Green feels nice.
Red gets results.


3) The “45–15” method (because humans aren’t built for 3-hour marathons)

Try:

  • 45 mins focused work

  • 15 mins break
    Repeat 2–3 times, then stop.

On the break:

  • Move

  • Drink water

  • Snack

  • Do not “just quickly check” social media unless you fancy losing 40 minutes to a video of a dog reviewing hotel rooms.


4) Make revision active: turn notes into questions

If you have notes already, brilliant — now convert them.

Instead of:

  • “Ohm’s Law: V = IR”

Make:

  • “If V = 12V and R = 4Ω, what is I?”

  • “What happens to current if resistance doubles (voltage constant)?”

  • “What’s the difference between resistance and resistivity?”

Your goal is to create something you can test yourself on.


5) Flashcards: the right way (and the way that wastes your time)

✅ Good flashcards:

  • One question, one answer

  • Include examples and common mistakes

  • Used with spaced repetition (coming up)

❌ Bad flashcards:

  • A whole page of notes squeezed onto a card

  • “Define photosynthesis” with a paragraph answer you never actually say

  • Cards you read like a tiny textbook (adorable, but no)


6) Spaced repetition: revise little and often (instead of panic and chaos)

Spacing is revision’s secret weapon.

A simple schedule:

  • Day 1: learn it

  • Day 2: quick test

  • Day 4: test again

  • Day 7: test again

  • Day 14: test again

Short, repeated retrieval beats one massive “revision day” every time.


7) Interleaving: mix topics like an exam does

Students love revising in neat blocks:

“Today I do only waves. Tomorrow only electricity. Friday only suffering.”

But exams don’t work like that. They bounce.

So mix it:

  • 20 mins topic A

  • 20 mins topic B

  • 20 mins topic C
    Then circle back.

This forces your brain to choose the right method, not just repeat the same one.


8) Past papers: how to use them without fooling yourself

A past paper is only useful if you do it like this:

  1. Do questions without notes

  2. Mark with the mark scheme

  3. For each mistake, write:

    • What I did wrong

    • What the examiner wanted

    • A model answer (or corrected method)

  4. Re-do the same style question 2–3 days later

If you do a past paper, look at the mark scheme, and say “ah yes, makes sense” — that’s not revision. That’s mark scheme appreciation.


9) The “two-page rule” for every topic

For each topic, aim to end up with:

  • One page of key facts / equations / definitions

  • One page of exam-style questions you can answer

That becomes your personal “exam pack”.

It’s also a brilliant way to stop revision turning into a stationery hobby.


10) What to do the week before the exam

  • Daily: 30–60 mins retrieval + practice questions

  • Rotate weak topics

  • Do timed questions

  • Sleep like it’s part of your grade (because it is)

The night before:

  • Light review only

  • Pack kit

  • No “I’ll just learn the whole of organic chemistry from scratch” heroics


A simple revision plan you can copy

Mon–Fri (60–90 mins):

  • 10 mins: quick flashcard review

  • 40 mins: weak topic retrieval + corrections

  • 20 mins: exam questions (timed if possible)

Weekend (2 hours):

  • 1 past-paper section (or 2 shorter sets)

  • Mark + make corrections

  • Make 5–10 flashcards from mistakes


Final thought

Effective revision is boring in the way that winning is boring.

It’s not about motivation.
It’s about a system that works even when you can’t be bothered.

And yes — you can absolutely do it without becoming a human highlighter.

Wednesday, 4 March 2026

Just how many spare camera batteries do you need?


Just how many spare camera batteries do you need?

There are two kinds of filmmakers:

  1. The ones who carry one battery and “trust the universe”.

  2. The ones who carry eight, plus a spreadsheet, plus a small solar farm.

I have been both. Usually on the same day.

Because here’s the truth: the number of spare batteries you need isn’t “a number”. It’s a relationship between (a) how long you’re filming, (b) what you’re filming with, and (c) how likely it is that the universe will choose today to teach you humility.

The simple rule (that actually works)

Bring enough battery for your expected filming time… then add one extra battery “for chaos”.

Chaos is: wind, cold, 4K/8K, image stabilisation, autofocus, Wi-Fi, Bluetooth, a mic receiver you forgot was powered, and that moment when someone says:
“Could you just do that again, but… better?”

Start with a quick battery reality check

Ask yourself:

  • How long will I be rolling for real? (Not “how long will I be out”.)
    A two-hour sailing session can become 30 minutes of actual recording… or two hours if you’re capturing everything “just in case”.

  • What are you filming on?
    Phones sip power until they don’t. Mirrorless cameras can be efficient… until you add external monitors, IBIS, high frame rates, and continuous AF. 360 cameras have their own special talent for eating batteries while you’re distracted by “how cool this looks”.

  • Can you charge during the day?
    Car charger? USB-C PD? Power bank? Solar? If yes, you can carry fewer batteries and more charging capability.

A practical “how many spares?” guide

Use this as a starting point (then adjust for your own kit and habits):

A) Short shoot (up to ~1 hour of actual recording)

  • Minimum: 1 spare

  • Comfortable: 2 spares

  • If it’s cold / you’re filming 4K/slow-mo: add 1

B) Half-day shoot (2–4 hours of mixed filming)

  • Minimum: 2 spares

  • Comfortable: 3–4 spares

  • If you’re using an external monitor or lots of AF: lean to 4

C) Full day / event coverage

  • Minimum: 4 spares

  • Comfortable: 6+ spares or a power solution (USB-C PD / dummy battery / V-mount style setup)

  • If you cannot charge at all: assume you’ll need more than you think

D) Boats, sailing, outdoor winter filming

  • Minimum: take your normal number and add one more
    Cold weather can make a perfectly good battery behave like it’s nearing retirement.

The hidden battery killers (a short list of villains)

If your battery life feels “mysteriously short”, it’s usually one of these:

  • High resolution / high bitrate recording

  • High frame rate (50/60/120fps)

  • Image stabilisation working hard

  • Continuous autofocus and face tracking

  • Bright screens (especially external monitors)

  • Wireless features (Wi-Fi/Bluetooth)

  • Long “camera on, not recording” time (the silent assassin)

A smarter approach than hoarding batteries

Sometimes the answer isn’t more batteries. It’s a plan.

1) Power bank + USB-C PD charging
Great for breaks between takes (and for phones/360 cameras). Even better if your camera can run/charge via USB-C while operating.

2) In-car charging
If you’re travelling between locations, that car becomes your mobile power station.

3) One “big battery” option
Depending on your setup: dummy battery to power bank, or a larger external pack for longer stints (especially for video).

4) Label and rotate
Number your batteries. Rotate use. Retire the “problem child” that always dies early.

My “leave-the-house” battery checklist

Before you go:

  • Batteries charged ✅

  • Spares packed ✅

  • Charger packed ✅

  • Cable(s) packed ✅

  • Power bank / car adapter ✅

  • Batteries stored safely (caps/case, no loose batteries rolling around) ✅

Because nothing says “professional video workflow” quite like rummaging in a bag for a battery while your subject drifts away downriver.

So… how many do you need?

If you want a one-line answer:

  • Casual filming: 1–2 spares

  • Serious filming: 3–4 spares

  • All-day / mission-critical / cold / boat day: 4–6 spares or spares + a proper charging/power strategy

And always, always pack one extra battery for chaos.

Tuesday, 3 March 2026

R&D — From test tubes to tell-tales: building an electronic burgee

 


R&D — From test tubes to tell-tales: building an electronic burgee

There’s a myth that R&D only happens in white coats, surrounded by fume cupboards and the faint smell of “who left the hotplate on?”. In our world, research and development is just as likely to happen in a buoyancy aid, crouched in the bottom of a dinghy, wondering whether that “slight breeze” is actually a wind shift or just your hat trying to make a break for it.

Because here’s the thing: sailing is basically applied physics with occasional splashing. And once you’ve spent a lifetime building experiments, teaching students to measure the unmeasurable, and persuading sensors to behave themselves, it’s only a matter of time before you look at a masthead burgee and think: Yes… but what if it had data?

The problem: the masthead knows… but the helm doesn’t

A traditional burgee and wind indicator are brilliant—simple, reliable, and they don’t need charging. The only snag is that the truly useful information is happening at the top of the mast, while the people making the decisions are down below doing impressions of a human washing line.

On rivers (hello Thames), wind can be wildly different even a few metres up. Trees, banks, moored boats, bridges—everything interferes. So the burgee might be telling the truth, but it’s telling it to the clouds.

The R&D idea: an electronic burgee you can actually see

So the concept is this:

  • A combined weather vane + anemometer at the masthead

  • Measurements relayed down the mast (wire or wireless)

  • A screen at the foot of the mast showing:

    • Wind direction (relative to the boat’s heading)

    • Wind speed (and ideally gusts)

    • A “trend” indicator (strengthening / easing)

In other words: the masthead’s gossip comes down to deck level, where it can be acted on without a crew member performing an interpretive dance while staring upwards.

Why this matters (especially for learning and coaching)

This isn’t just gadget-lust (although I admit gadgets have a strong pull, like biscuits). An electronic burgee could genuinely help with:

  • Training: showing new helms how wind direction relates to boat trim and course

  • Tacking and gybing: timing manoeuvres when the wind is behaving oddly along the river

  • Sail setup: helping the crew see what changes in downhaul, kicker/gnav, outhaul actually do

  • Safety: spotting gusts building before they smack you like a wet duvet

It turns sailing into something you can observe, measure, and learn from, rather than “feel vaguely and argue about afterwards”.

Practical design thoughts (before we invent a new type of disappointment)

If we’re doing this properly, it needs to survive real sailing life, which includes: water, shocks, UV, vibration, and that special kind of accidental abuse known as “launching”.

Key R&D questions:

  • Power: small battery? solar trickle? or run a thin cable down the mast?

  • Data link: wired (reliable) vs wireless (neat but fussy around masts, water, and interference)

  • Ruggedness: waterproofing, salt resistance (for coastal), and impact survival

  • Display: sunlight readable, simple icons, big numbers, minimal menus

  • Calibration: direction needs a reference (boat heading / mast alignment) so it doesn’t lie politely

The dream is something that’s useful in 3 seconds, not something that requires a PhD and a laptop on a spinnaker bag.

The bigger point: R&D is a mindset, not a department

This is why R&D leaks out of science and into sailing. Once you start asking “how could this be better?” you can’t switch it off. The lab and the boat are both environments where small improvements make a big difference—and where the real world happily punishes sloppy thinking.

So yes, we’re looking at building an electronic burgee. Not because we need more screens in our lives… but because if we can make wind behaviour clearer, training quicker, and sailing safer (and maybe reduce the amount of shouting during a tack), then it’s exactly the kind of R&D that’s worth doing.

And if it all goes wrong? Well… we can always fall back on the traditional system: lick a finger, hold it up, and pretend that was “data”.

Monday, 2 March 2026

Using AI tools to help with video editing (subtitles, effects, colour balancing)

 


Using AI tools to help with video editing (subtitles, effects, colour balancing)

There was a time when “post-production” meant tea, biscuits, and the slow realisation that you’d filmed everything… except the bit where you explain the thing. These days, AI has barged into the edit suite like an over-helpful assistant: occasionally brilliant, occasionally confident-and-wrong, but almost always faster than doing it all by hand.

Used sensibly, AI can take the boring, repetitive bits of editing (transcribing, syncing, rough selects, basic colour matching) and give you more time for the bits that actually matter: storytelling, pacing, and making your video look like you planned it that way.

1) Extracting subtitles: the fastest “instant upgrade”

Subtitles are no longer just for accessibility (although that’s reason enough). They’re also for:

  • viewers watching on mute,

  • short-form platforms that love on-screen text,

  • anyone trying to follow a technical explanation at speed.

Typical AI workflow (10–20 minutes instead of 2 hours):

  1. Auto-transcribe your timeline or selected clips.

  2. Clean up names, jargon, and units (AI always butchers “DaVinci”, “spectrophotometer”, and any student’s surname).

  3. Turn transcript into captions and choose a readable style.

  4. Export SRT for YouTube, or burn captions in for socials.

If you’re using Adobe Premiere Pro, Speech-to-Text will generate a transcript and create captions directly from it.

If you’re using DaVinci Resolve Studio, the Neural Engine features cover a lot of AI-assisted workflow (and Blackmagic explicitly positions AI as part of Resolve’s toolset).

And if you want a very “edit by typing” approach (especially for talking-head, tuition, or voiceover-heavy videos), Descript is built around transcription-first editing and quick caption creation.

My rule: subtitles from AI are draft subtitles. Always do a quick skim before publishing. One wrong word can turn GCSE chemistry into interpretive poetry.


2) Graphical effects: letting AI do the donkey work

This is where AI can feel like magic—particularly for tasks that used to mean frame-by-frame misery:

  • Smart reframing (turn wide shots into vertical without chopping heads off),

  • Object tracking / region tracking (so text or blur sticks to the right thing),

  • Background removal / masking assistance (especially for quick explainers),

  • Auto “rough cut” helpers (finding pauses, removing silences, assembling selects).

Resolve’s AI tooling (Neural Engine) includes features like object detection, smart reframing, and more—useful for turning one master video into multiple platform-friendly versions.

For more experimental or generative workflows (and the “how on earth did you do that?” factor), platforms like Runway lean hard into AI-powered video creation and manipulation tools.

Practical tip: use AI effects to get you 80% of the way quickly, then finish manually. That last 20% is where “professional” lives.


3) Colour balancing: AI as your first pass, not your final grade

Colour is the sneaky time thief. AI can help you:

  • balance exposure and white balance,

  • match shots from different cameras,

  • get a consistent “base look” before you do your creative grade.

Resolve’s Neural Engine includes auto colour and colour matching among its AI-driven features.
That’s ideal when you’ve got (say) a Canon on a tripod, a 360 camera doing its own thing, and a phone clip your son grabbed at exactly the wrong colour temperature.

A sensible grading approach:

  1. AI auto-colour / shot match to normalise clips.

  2. Check with scopes (waveform/vectorscope) because your eyes lie.

  3. Then apply your creative grade (warmth, contrast, “sunny day optimism”, etc.).

AI gets you to “not embarrassing” fast. You get yourself to “that looks lovely”.


The “don’t let AI ruin your life” checklist

  • Check proper nouns (people, places, boat names, science terms).

  • Watch for confident hallucinations in captions (“jib” becoming “gym”, “gnav” becoming “navy”…).

  • Keep a house style: caption fonts, sizes, safe margins, brand colours.

  • Don’t overdo effects: if the AI effect is the most interesting part, your story has a problem.

  • Archive your transcript: it becomes blog material, revision notes, worksheet text, and searchable video metadata.