Revision cheat sheets.
Actually useful ones.

Every essential formula, laid out clearly with units — plus the exam tips that turn Grade 5s into Grade 7s.

• Forces & motion — resultant force, momentum, energy
• Electricity — Ohm's Law, power, series & parallel
• Waves — wave speed, Snell's Law, refractive index
• Nuclear & atomic — photon energy, half-life, E=mc²
• Exam tips on forces diagrams & 6-mark questions

The formulas students always forget — with the common mistakes that lose marks highlighted throughout.

• Algebra — quadratic formula, index laws, completing the square
• Geometry — area & volume for every shape
• Trigonometry — SOH-CAH-TOA, sine rule, cosine rule
• Statistics — mean from tables, probability rules
• Exam tips on brackets, rearranging and trig selection

The concepts students find hardest — bonding, moles and reactions — explained clearly with exam technique built in.

• Atomic structure — protons, neutrons, isotopes, periodic table
• Bonding — ionic, covalent, metallic, hydrogen bonds
• Quantitative chemistry — moles, concentration, % yield
• Key reactions — combustion, neutralisation, electrolysis
• Exam tips on bonding questions and mole calculations

Biology rewards students who understand the "why" — this sheet gives you the key facts and the exam language to score full marks.

• Cell biology — animal, plant, prokaryotic, diffusion, osmosis
• Biological processes — photosynthesis & respiration equations
• Genetics — DNA, inheritance, mitosis vs meiosis, evolution
• Human body — circulatory, nervous, endocrine, immune systems
• Exam tips on osmosis wording & 6-mark extended answers