A-level Physics OCR A first, more boards soon

Find the marks you're losing.

Exam-style A-level Physics questions, marked step by step like a real examiner. See which step cost you, and what to revise next.

Free to start · No card needed · 10-minute check

How marking works

Every step, marked.

Most apps tell you right or wrong. We show which step lost the mark, then plan your next session around it.

  • M1 ✓Method marks for the right approach
  • A0 ✗Accuracy marks for the final answer
  • →A 6-minute fix, added to your plan
Let's see how you did…
A-level Physics · OCR A · 4.2 ResistanceMarking

[2 marks]Question 3A 12 V supply is connected across a resistor. The current in the resistor is 0.50 A. Calculate the resistance of the resistor.

R = V ÷ I
R = 12 ÷ 0.5
R = 6 Ω

Lost 1 mark on dividing by a decimal, not on resistance. Right equation, right substitution. The slip was 12 ÷ 0.5, which halves instead of doubles. Added to Thursday 4 quick questions · dividing by decimals · 6 min

Sound familiar?

It's 11pm.

You've read the same chapter three times.

You still don't know what you'd lose marks on.

23:04 · revising

The idea

Rereading feels like revision. It mostly isn't. The marks you drop come from a handful of specific steps: a unit you forgot, an equation rearranged wrong, a definition you half know. Find those steps, fix them, and check they stay fixed.

That's the whole idea.

Try one now

Answer it. Get marked.

No sign-up. Pick a subject, have a go, and see exactly where the marks go. Wrong answers are the interesting ones.

Go on. I won't tell anyone.
[2 marks]

Your marks will appear in the margin →

How it works

Four steps. Then again tomorrow.

  1. 01Diagnose

    A 10-minute mixed check across your spec. Don't revise first. We want to see where you really are.

  2. 02Find

    Not just "Electricity 61%". The exact skill that cost you: rearranging, units, a definition, an explanation.

  3. 03Fix

    A short explanation, one worked example, then questions on that exact step. Hints before answers.

  4. 04Prove

    The topic comes back days later with fresh questions. Get it right cold and it leaves your list.

Diagnostic checkA-level Physics · OCR AK
Question 4 of 12 · 1 mark

What is the SI unit of resistivity?

AΩ m⁻¹
BΩ mCorrect ✓
CΩ m²
Electricity · where your marks went
Electric circuits85%
Electromagnetism68%
Electric fields55%
Capacitance42%
Marks usually lost on
− Rearranging τ = RC− μF → F conversion− Reading ln graphs
Today · 20 minutes

Capacitor discharge

Read: what τ = RC means3 min
Worked example: time to half charge5 min
6 questions on rearranging12 min
Session6/6
Capacitance · shown mastery
78%
+36 in 3 weeks
Week 1Week 2Week 3
Off your list. Back for a recap in 10 days.

Mark scheme language

Learn to read the margin.

Examiners use a short code for every mark. Once you know it, you can see exactly how marks are given, and why you didn't get one.

Rubi: Pick a code and I'll show you where it goes.

A marked exam answer sheet with a red tick and a red circle around an answer, and a yellow highlighter.M1 ✓A0 ✗B1 ✓ecf
  • M1
    Method markFor a correct method, even if the final answer ends up wrong.
  • A1
    Accuracy markFor the correct answer. Usually only given if you've earned the method mark first.
  • B1
    Independent markFor a correct statement or value on its own, not tied to a method.
  • ecf
    Error carried forwardUse a wrong earlier answer correctly later on, and you can still pick up marks.

Meet the crew

Marky has backup.

Each of them looks after one part of your revision. Tap one to say hello.

Built for everyone

Revision that works for every brain.

Everyone revises differently. The crew have set a few things up so nobody gets left behind.

Pip says

Easy to read

A font designed for readability, pages that zoom cleanly with your browser, and dark mode for late nights.

Rubi says

Not just colour

Every mark uses a shape as well as a colour, ✓ and ✗, so nothing depends on telling red from green.

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Your topics

Your whole spec, one honest map.

Every topic scored on what you've shown you can do, not how confident you feel. Highlighted means revise next. Tap any topic.

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Free revision guides

Every topic. Free to read.

Clear notes, worked exam-style examples and the mistakes that cost marks, for OCR A topics, with more on the way. No sign-up needed to read.

Flip: Read one, and I'll bring it back right before you'd forget it.

Inside every guide

Built to answer the question you searched.

  1. The short answer, in two sentences
  2. Key equations, with units
  3. Worked exam-style examples
  4. Where marks are usually lost
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Keep scrolling →
A-level PhysicsOCR A · Module 4

Resistance and resistivity

Resistance depends on the material, its length and its cross-sectional area.

R = ρL / A
✗Forgetting to convert mm² to m² before substituting.
Read guide →6 min
A-level PhysicsOCR A · Module 6

Capacitor discharge

Charge falls exponentially. After one time constant, about 37% of the charge is left.

Q = Q₀ e^(−t/RC)
✗Using μF as F and getting τ a million times too big.
Read guide →9 min
A-level PhysicsOCR A · Module 5

Simple harmonic motion

Acceleration is proportional to displacement and always points back towards the centre.

a = −ω²x
✗Using degrees instead of radians in x = A cos(ωt).
Read guide →8 min
A-level PhysicsOCR A · Module 4

The photoelectric effect

One photon frees at most one electron, and only if hf is at least the work function.

hf = φ + KEmax
✗Forgetting to convert eV to joules (× 1.60 × 10⁻¹⁹).
Read guide →7 min
A-level PhysicsOCR A · Module 5

Gravitational fields

Field strength falls with the square of the distance from the centre of the mass.

g = GM / r²
✗Using height above the surface instead of distance from the centre.
Read guide →8 min
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Module 3: Forces and motion →Module 4: Electrons, waves and photons →Module 5: Newtonian world →Module 6: Particles and medical physics →

The tutor

Hints first. Answers last.

Getting the answer handed to you feels like progress. It isn't. The tutor nudges one step at a time, so you do the thinking and remember it in the exam.

Pip: Show your working. Even when you're sure.

  • Knows your courseSet up for OCR A A-level Physics. Paste the question you’re stuck on.
  • Says when it isn’t sureIt’s told to flag anything that might not match the spec. Check against your notes.
  • 5 messages a day, freeEnough for the questions that really stick. Resets at midnight.
TutorA-level Physics · Capacitors
Waiting

On your phone

Six minutes on the bus counts.

Sessions are short and built from your own gaps, so a spare few minutes actually moves something. Open it on your phone or laptop and pick up where you left off.

  • 6mBite-size sessions aimed at one step
  • ✓Streaks that count real practice, not logins
  • →Your plan updates after every answer
9:41●●● 100%
Thursday
Today
Up next
Dividing by decimals
4 questions · 6 minStart
Streak
MTWTFSS
This week
Capacitor dischargePhysics · 20 min · Thu
Simple harmonic motionPhysics · 15 min · Fri
Photoelectric effectPhysics · 5 min · Sat
Session ready6 min · dividing by decimals
+1 mark won backPhysics · resistance
Capacitance 42% → 78%Off your list

Your plan

Start from your first paper.

Tell us when your first exam is and how much time you've got. The plan works backwards and gets busier where it should.

Tempo: Pick your days. I'll keep the streak honest.

Check the date against your school's exam timetable.

Between now and then
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Highlighted weeks are the final run-in, when the plan switches to timed papers.

A grade boundary can be a handful of marks. Each one you win back counts.

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Why this exists

Most revision sites tell you the answer. Very few tell you which step cost you the mark. That’s the gap we’re building for.

The Revision Hub

Teachers · coming later

A class view is on the way.

We're building for students first. If you teach and want to see which steps your class gets wrong most often, leave your email and we'll tell you when it's ready.

Questions

Fair questions.

No. Past papers belong to the exam boards. We write original exam-style questions mapped to your specification, with our own mark schemes, and link to official papers where boards allow it.

Calculations and multiple choice are marked by fixed rules, so the same answer always gets the same mark. AI feedback on longer written answers is planned for Plus and isn’t live yet.

We're starting with OCR A A-level Physics and doing it properly. AQA and Pearson Edexcel A-level Physics come next, then GCSE Physics.

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A0 ✗M1 ✓B1 ✓check units!

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