Structured lessons from first principles to O-level standard. Practice one question at a time — wrong answers come back until you actually get it.
A loop that builds genuine long-term recall — not just recognising the answer you saw last night.
Every concept opens with a clear, concise explanation. No textbook walls — just what you need to actually follow the idea before you practise it.
Multiple choice, fill in the blank, or drag and drop. Each question is answered before you move on — no skipping, no surfing through.
Wrong answers get quietly queued for your next session. A concept isn't ticked off until every question has been answered correctly.
Wrong answers don't quietly disappear. They come back in your next session, spaced out the way memory research says works — without you having to set up a single flashcard.
Multiple choice tests whether you recognise the right answer. Fill in the blank tests whether you can recall it cold. Drag and drop tests whether you understand order and sequence.
Whether you're right or wrong, you get a clear explanation of why — not just what. That's the bit that actually prevents you from making the same mistake in an exam.
Each concept opens at first principles and works through to O-level standard. You're never dropped into the deep end, and you're never stuck at the shallow end either.
Oxidation states, half-equations, balancing redox reactions step by step.
Electrolysis, electrode potentials, electrochemical cells and feasibility.
The mole concept, empirical and molecular formulae, stoichiometry.
Titration techniques, acid-base calculations, redox titrations with KMnO₄.
Electron configuration, subshells, orbital notation and quantum numbers.
Ionic, covalent, metallic bonding and molecular shapes.
Enthalpy changes, Hess's law, lattice enthalpy, bond energies.
New units added as the curriculum expands.
Free account. No credit card. First session in under a minute.