IB DP Class 11 Science

IB DP Class 11 Science Stream 2026-27

Physics • Chemistry • Biology • Mathematics — HL & SL

Build a strong foundation for university and beyond with IB DP Science. Your complete IB DP Science roadmap for academic and university success.

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4 Core Subjects 6 Sections HL & SL Options Updated for 2026-27

IB DP Science Syllabus 2026-27

Physics

• Measurements and Uncertainties
• Mechanics
• Thermal Physics
• Waves
• Electricity and Magnetism
• Circular Motion and Gravitation
• Atomic, Nuclear and Particle Physics
• Energy Production
• HL: Wave Phenomena, Fields, Quantum & Nuclear

Chemistry

• Stoichiometric Relationships
• Atomic Structure
• Periodicity
• Chemical Bonding and Structure
• Energetics/Thermochemistry
• Chemical Kinetics
• Equilibrium
• Acids and Bases
• HL: Redox, Organic, Advanced Topics

Biology

• Cell Biology
• Molecular Biology
• Genetics
• Ecology
• Evolution and Biodiversity
• Human Physiology
• HL: Nucleic Acids, Metabolism, Plant & Animal Physiology

Mathematics

• AA: Number and Algebra, Functions, Geometry, Calculus
• AI: Number and Algebra, Functions, Geometry, Statistics
• HL (AA): Advanced Calculus, Advanced Algebra
• HL (AI): Advanced Statistics, Advanced Geometry

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IB DP Science Exam Pattern 2026-27

Subject	Paper 1	Paper 2	Paper 3	IA
Physics	20% (MCQ)	40% (SL) / 36% (HL)	20% (SL) / 24% (HL)	20%
Chemistry	20% (MCQ)	40% (SL) / 36% (HL)	20% (SL) / 24% (HL)	20%
Biology	20% (MCQ)	40% (SL) / 36% (HL)	20% (SL) / 24% (HL)	20%
Mathematics	40% (Paper 1)	40% (Paper 2)	20% (HL only)	N/A

HL exams are longer with additional content. Paper 3 is HL only for Mathematics.

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IB DP Science Important Dates 2026-27

Event	Date (Tentative)
Academic Year Start	April 2026
Unit 1 Assessments	May-June 2026
Unit 2 Assessments	August-September 2026
Mock Examinations	October 2026
Unit 3 Assessments	November-December 2026
Unit 4 Assessments	January-February 2027
IA Final Submission	February 2027
Final DP Exams	April-May 2027
Result Declaration	July 2027

Dates are tentative. Please check with your IB school for exact dates.

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IB DP Science Preparation Tips

Subject-wise Strategy

• Physics: Master concepts, practice problem-solving
• Chemistry: Focus on equations and reaction mechanisms
• Biology: Learn diagrams, processes, and terminology
• Mathematics: Practice daily, master formulas and techniques

IA & Exam Strategy

• Start IA early, choose a topic you're passionate about
• Solve past papers regularly
• Take mock tests under timed conditions
• Seek feedback from teachers regularly

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IB DP Science Important Chapters

Physics

• Mechanics - Motion, Forces, Work, Energy
• Waves - Wave properties and behavior
• Electricity & Magnetism
• Thermal Physics
• HL: Fields, Quantum, Nuclear

Chemistry

• Stoichiometry - Calculations and reactions
• Chemical Bonding - Structure and properties
• Energetics - Thermodynamics
• Equilibrium - Acids and Bases
• HL: Organic, Redox, Advanced Topics

Biology

• Cell Biology - Structure and function
• Genetics - DNA, genes, heredity
• Ecology - Ecosystems and interactions
• Human Physiology - Body systems
• HL: Plant & Animal Physiology

Mathematics

• AA: Functions, Algebra, Calculus
• AI: Functions, Statistics, Geometry
• HL: Advanced Calculus/Statistics

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IB DP Science Chapter Weightage

Subject	Topic Area	Weightage
Physics	Core Topics (1-8)	70-80%
	HL Topics (9-12)	20-25%
	Internal Assessment	20%
Chemistry	Core Topics (1-8)	70-80%
	HL Topics (9-13)	20-25%
	Internal Assessment	20%
Biology	Core Topics (1-6)	70-80%
	HL Topics (7-11)	20-25%
	Internal Assessment	20%
Mathematics	Paper 1	40%
	Paper 2	40%
	Paper 3 (HL only)	20%

Weightage may vary. Please check with your IB school for exact distribution.

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Frequently Asked Questions

What subjects are included in IB DP Science stream?

IB DP Science stream includes Physics, Chemistry, Biology, and Mathematics as core subjects. Students can choose 3 HL and 3 SL subjects across all groups.

What is the difference between HL and SL in IB DP?

HL (Higher Level) subjects cover more content (240 teaching hours) and require greater depth. SL (Standard Level) subjects cover core content (150 teaching hours). Students must choose 3 HL and 3 SL subjects.

How can StudyDecode help me with IB DP Science?

StudyDecode provides comprehensive guidance for IB DP Science students. From subject selection to exam preparation, IA support, TOK, EE, and CAS — we help you build a strong foundation. Book a free consultation to know more.