Paper memory · 2019–2026

Analysis · trends + year reviews

One place for multi-year share movement and session-by-session paper reviews — read the signal, open a year, then drill notes or mixed joins.

At a glance

Analysis cockpit

8Year reviews

2019–2026 pattern + strategy notes

7yTrend window

2020–2026 share matrices by subject portion

35Mixed stems

Cross-topic joins tagged for drill on /mixed

3Subject lenses

Math · Physics · Chem with notes protocols attached

Rising signals

Portions gaining share — protect bank time here.

Math: Multi-concept Calculus–Conics joins
Math: Linked numerical stems (esp. 2025–26 P2)
Physics: EMI/AC & mutual inductance
Physics: Experimental physics / error analysis
Physics: Optics consistency
Chem: Organic (GOC, carbonyl, biomolecules, polymers, practical)

Falling ≠ ignore

Large topics can fall in % and still print many questions.

Math: Isolated single-topic easy Calculus volume vs 2020 peak
Physics: Mechanics share (still #1 absolute)
Chem: Physical share (not Physical importance)

How to use this hub

Scan PCM trends for rising / floor topics.
Open 1–2 recent year reviews (2023–2026 first).
Jump to notes quick card or mixed stems for that year.

Multi-year movement

PCM trend analysis

Charts + narratives + share matrices. Deep share maps live on each subject hub from the dashboard.

Mathematics

242 tagged · 60–90s methods · 27 topic pages

Notes Quick card Share map

AlgebraCalculusCoordinate GeometryVectors & 3DTrigonometry

2020

2021

2022

2023

2024

2025

2026

Narrative

Algebra is the largest Math bucket every year (complex, matrices, probability, P&C, sequences).
Calculus peaked in 2020 (~44%) and stabilised near 24–29% from 2021–2026.
Coordinate Geometry (conics) oscillates: spikes in 2021, 2022, 2026; quieter in 2023 and 2025.
Vectors & 3D spiked in 2023; still a reliable multi-correct/numerical presence.
Recent papers (2024–2026) emphasise multi-concept stems: conics+area, DE+functions.

Signals

Rising: Multi-concept Calculus–Conics joins, Linked numerical stems (esp. 2025–26 P2)

Falling: Isolated single-topic easy Calculus volume vs 2020 peak

Stable: Algebra core, Calculus as #2 cluster, Annual Vectors & 3D appearance

Share of subject by year (%)

Year	Total	Algebra	Calculus	Coordinate Geometry	Vectors & 3D	Trigonometry
2020	36	33.3%	44.4%	8.3%	8.3%	5.6%
2021	38	44.7%	23.7%	21.1%	2.6%	7.9%
2022	34	35.3%	26.5%	17.6%	8.8%	11.8%
2023	34	35.3%	26.5%	5.9%	20.6%	11.8%
2024	34	32.4%	23.5%	11.8%	11.8%	20.6%
2025	32	43.8%	25%	6.2%	15.6%	9.4%
2026	34	35.3%	29.4%	17.6%	11.8%	5.9%

Internal summary

5 top-level topics covering 242 tagged questions.
Core-daily intensity topics: Algebra, Calculus.
Rising topics: Vectors & 3D.
Falling topics: Algebra, Calculus, Coordinate Geometry.

Planning tips

Allocate weekly hours roughly proportional to shareOfSubject, then boost rising topics by +20%.
Inside each topic, drill the top 2–3 subtopics first — they usually carry >50% of that topic.
Use typeMix: if MC% is high, practise option-elimination; if NUM% is high, timed calculation.
Link weeklyPlan items to relatedMixedIds so joins are practised, not only silos.

Algebra · falling · 37.2%Calculus · falling · 28.5%Coordinate Geometry · falling · 12.8%Vectors & 3D · rising · 11.2%Trigonometry · stable · 10.3%

Physics

235 tagged · 60–90s methods · 27 topic pages

Notes Quick card Share map

MechanicsOpticsThermodynamics/Kinetic TheoryElectrostaticsWaves/SHM/SoundMagnetism/EMI/ACModern PhysicsCurrent ElectricityFluid/Properties of Matter

2020

2021

2022

2023

2024

2025

2026

Narrative

Mechanics remains #1 but cooled from ~42–45% (2020–21) to ~24–28% (2023–26).
Magnetism/EMI/AC strengthened again in 2024 and 2026 (~15%).
Optics is a persistent second tier; experimental/error analysis appeared clearly in 2026 P2.
Thermo cycles and Waves/SHM recur as multi-step numericals.
Linked stems join fluids+capacitance and rotation+collision (2026 P2).

Signals

Rising: EMI/AC & mutual inductance, Experimental physics / error analysis, Optics consistency

Falling: Mechanics share (still #1 absolute)

Stable: Mechanics leadership, Thermo presence, Modern Physics as compact scorer

Share of subject by year (%)

Year	Total	Mechanics	Optics	Thermodynamics/Kinetic Theory	Electrostatics	Waves/SHM/Sound	Magnetism/EMI/AC	Modern Physics	Current Electricity	Fluid/Properties of Matter
2020	36	41.7%	2.8%	13.9%	11.1%	8.3%	8.3%	5.6%	2.8%	5.6%
2021	38	44.7%	7.9%	7.9%	18.4%	2.6%	7.9%	5.3%	5.3%	0%
2022	27	33.3%	18.5%	14.8%	11.1%	3.7%	11.1%	3.7%	3.7%	0%
2023	34	26.5%	20.6%	14.7%	5.9%	14.7%	2.9%	8.8%	5.9%	0%
2024	34	23.5%	14.7%	5.9%	8.8%	23.5%	14.7%	5.9%	0%	2.9%
2025	32	28.1%	12.5%	12.5%	9.4%	12.5%	9.4%	12.5%	0%	3.1%
2026	34	26.5%	17.6%	11.8%	8.8%	5.9%	14.7%	5.9%	5.9%	2.9%

Internal summary

9 top-level topics covering 235 tagged questions.
Core-daily intensity topics: Mechanics.
Rising topics: Optics, Waves/SHM/Sound, Magnetism/EMI/AC.
Falling topics: Mechanics, Electrostatics.

Planning tips

Allocate weekly hours roughly proportional to shareOfSubject, then boost rising topics by +20%.
Inside each topic, drill the top 2–3 subtopics first — they usually carry >50% of that topic.
Use typeMix: if MC% is high, practise option-elimination; if NUM% is high, timed calculation.
Link weeklyPlan items to relatedMixedIds so joins are practised, not only silos.

Mechanics · falling · 32.3%Optics · rising · 13.2%Thermodynamics/Kinetic Theory · stable · 11.5%Electrostatics · falling · 10.6%Waves/SHM/Sound · rising · 10.2%Magnetism/EMI/AC · rising · 9.8%Modern Physics · stable · 6.8%Current Electricity · stable · 3.4%Fluid/Properties of Matter · stable · 2.1%

Chemistry

241 tagged · 45–75s methods · 27 topic pages

Notes Quick card Share map

PhysicalOrganicInorganic

2020

2021

2022

2023

2024

2025

2026

Narrative

Physical fell from ~72% (2020) to ~35% (2026) but remains essential for numerical marks.
Organic rose steadily: ~11% (2020) → ~38% (2026).
Inorganic stays ~20–30% with coordination + bonding/VSEPR as scoring anchors.
Biomolecules, polymers and practical analysis (Kjeldahl/Carius) are regular in recent papers.
Expect Organic mechanism + practical/biomolecule joins to stay high-probability.

Signals

Rising: Organic (GOC, carbonyl, biomolecules, polymers, practical)

Falling: Physical share (not Physical importance)

Stable: Inorganic coordination/bonding, Physical thermo/equilib/electrochem numericals

Share of subject by year (%)

Year	Total	Physical	Organic	Inorganic
2020	36	72.2%	11.1%	16.7%
2021	38	47.4%	21.1%	31.6%
2022	33	51.5%	27.3%	21.2%
2023	34	50%	29.4%	20.6%
2024	34	47.1%	29.4%	23.5%
2025	32	43.8%	31.2%	25%
2026	34	35.3%	38.2%	26.5%

Internal summary

3 top-level topics covering 241 tagged questions.
Core-daily intensity topics: Physical, Organic.
Rising topics: Organic.
Falling topics: Physical.

Planning tips

Allocate weekly hours roughly proportional to shareOfSubject, then boost rising topics by +20%.
Inside each topic, drill the top 2–3 subtopics first — they usually carry >50% of that topic.
Use typeMix: if MC% is high, practise option-elimination; if NUM% is high, timed calculation.
Link weeklyPlan items to relatedMixedIds so joins are practised, not only silos.

Physical · falling · 49.8%Organic · rising · 26.6%Inorganic · stable · 23.7%

Falling share still means many questions if the topic is large (e.g. Mechanics). Use intensity on each topic page: core-daily vs fortnightly rotation. Pair trends with notes protocols — do not only chase % charts.

Session archive

Year reviews

Pattern, key areas, strategy, and that year’s mixed joins — open a year for the full analysis sheet.

2026

tagged+html-verified

Order: Mathematics → Physics → Chemistry

P1: 16 Q/subject with matching lists; P2: 18 Q/subject with linked numerical stems (+2).

Mixed stems: 14 · M 5 · P 5 · C 4

Math Algebra
Physics Mechanics
Chem Organic

Open 2026 review 2026 mixed

2025

tagged

Order: Mathematics → Physics → Chemistry

16 Q × 3; Paper 2 is SC+MC+long NUM (no matching in P2).

Mixed stems: 5 · M 2 · P 2 · C 1

Math Algebra
Physics Mechanics
Chem Physical

Open 2025 review 2025 mixed

2024

tagged

Order: Mathematics → Physics → Chemistry

Mixed section pattern continues; Math first.

Mixed stems: 4 · M 1 · P 2 · C 1

Math Algebra
Physics Mechanics
Chem Physical

Open 2024 review 2024 mixed

2023

tagged

Order: Mathematics → Physics → Chemistry

MC opener in P1 / SC opener in P2; matching or paragraph close.

Mixed stems: 3 · M 1 · P 1 · C 1

Math Algebra
Physics Mechanics
Chem Physical

Open 2023 review 2023 mixed

2022

tagged-partial

Order: Mathematics → Physics → Chemistry

Subject order flips to Math → Physics → Chemistry (continues through 2026).

Mixed stems: 3 · M 1 · P 1 · C 1

Math Algebra
Physics Mechanics
Chem Physical

Open 2022 review 2022 mixed

2021

tagged

Order: Physics → Chemistry → Mathematics

Linked numerical stems and paragraph-style SC appear.

Mixed stems: 3 · M 1 · P 1 · C 1

Math Algebra
Physics Mechanics
Chem Physical

Open 2021 review 2021 mixed

2020

tagged

Order: Physics → Chemistry → Mathematics

SC + MC + NUM blocks; Physics opens both papers.

Mixed stems: 3 · M 1 · P 1 · C 1

Math Calculus
Physics Mechanics
Chem Physical

Open 2020 review 2020 mixed

2019

ocr-partial

Order: Physics → Chemistry → Mathematics

Official scanned PDFs exist for both Paper 1 and Paper 2 in papers/.

Mixed stems: 0

Math Calculus & Conics (estimated)
Physics Mechanics (estimated)
Chem Physical + Organic mix (estimated)

Open 2019 review 2019 mixed

Student method

How to read analysis (30–45 min)

01
Trends first (10–15 min)
One subject chart + rising/falling list. Mark floor topics you must not skip this week.
02
One year deep (15–20 min)
Prefer 2024–2026. Read pattern → key areas → strategy. Skim mixed stems; do not solve all yet.
03
Convert to practice (10 min)
Open the matching notes quick card or 2 mixed joins. Analysis without a timed drill does not move marks.

Close the loop

Practice next

Mixed joins Math quick card 2027 forecast Dashboard coverage