UNIT 1 — CHEMICAL SUBSTANCES (25 marks):
  Chemical Reactions and Equations
  Acids, Bases and Salts
  Metals and Non-metals
  Carbon and Its Compounds
  Periodic Classification of Elements

UNIT 2 — WORLD OF LIVING (23 marks):
  Life Processes
  Control and Coordination
  How Do Organisms Reproduce?
  Heredity and Evolution

UNIT 3 — NATURAL PHENOMENA (12 marks):
  Light — Reflection and Refraction
  Human Eye and the Colourful World

UNIT 4 — EFFECTS OF CURRENT (13 marks):
  Electricity
  Magnetic Effects of Electric Current

UNIT 5 — NATURAL RESOURCES (7 marks):
  Our Environment
  Management of Natural Resources

CHEMISTRY (Board High Marks):
  Chemical reactions: types (combination, decomposition, displacement, redox)
  Balancing equations: conservation of mass
  Acids and bases: pH scale, indicators (litmus, phenolphthalein, methyl orange)
  Metals: reactivity series (K>Ca>Na>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>Au)
  Carbon compounds: covalency of carbon, saturated/unsaturated, functional groups

PHYSICS (Numerical Heavy):
  Electricity: V=IR, P=VI=I²R=V²/R, series (I same) vs parallel (V same)
  Lens/Mirror: 1/f = 1/v ± 1/u (sign convention critical), magnification
  Light: reflection laws, refraction, total internal reflection, prism

BIOLOGY (Diagram Based):
  Nephron diagram | Brain diagram | Reproductive system diagrams
  Mendel's experiment: TT×tt → Tt (F1) → 3:1 ratio (F2)
  Food chain, ecosystem, biogeochemical cycles

BOARD EXAM STRATEGY:
  NCERT is sufficient for 85%+ marks in science
  Practice diagrams: label neatly, use pencil for diagrams
  Numericals: write formula → substitute → solve showing units

PRACTICAL EXAM (20 marks):
  Know all NCERT experiments and observations
  Common practicals: pH testing, Ohm's law, lens focal length, photosynthesis

NTSE/OLYMPIAD EXTRA:
  More application-based, less direct NCERT
  Study beyond textbook: phenomena and explanations
  Time management: many questions in limited time